NCIS Season 21 is yet to be announced Feb 12, 2024 on CBS

When Agent Parker is framed for murder, the team puts their jobs and lives on the line to buy time and uncover the truth.

NCIS investigates the unexpected death of a Navy reservist who was an investigative journalist. Also, Knight and Jimmy's budding romance is put on hold when a vital organ transfer goes fatally wrong.

NCIS investigates a ring of clever teenage partygoers when a string of break-ins takes place at Marine Base Quantico. While working the case, Special Agent McGee forms a bond with one of the teens, Teagan Fields.

When an infamous arms dealer, Reymundo Diaz, is released from prison and bodies start piling up, Torres is forced to face the repercussions of his actions during an undercover operation he worked on years ago.

NCIS investigates the apparent suicide of a retired Navy officer who was in Palmer and Knight's grief group. Also, Torres gets a call from NCIS Special Agent Jane Tennant to come to Hawai'i when she gets a lead on a witness from a case they worked on together.

A gruesome mishap at a Navy petty officer's gender-reveal party leads NCIS to the case of a missing teacher that was popularized on a true crime podcast.

Parker's delinquent past resurfaces when NCIS is called to Philadelphia to investigate the death of a Navy petty officer.

As NCIS investigates the cause of death of a reservist Navy Seal surgeon, they're forced to bring Vance's daughter, Kayla, who recently trained with NCIS, to help with a highly dangerous mission.

While investigating the death of an intruder at Quantico, Jimmy and Kasie are exposed to a deadly biotoxin, and the NCIS team calls on Doctor Carol Wilson for help as they race to find the antidote. Also, Torres tries to distract Jimmy's daughter, who came to the office to spend the day with her dad.

When the body of a Navy lieutenant is discovered missing an eye, the NCIS investigation leads to the world of cage fighting.

After a civilian research vessel in the North Atlantic picks up a small boat of wounded Navy officers, NCIS arrives on the ship and is forced to hide after discovering terrorists on board. Also, Agent Knight takes a paper doll with her on the mission to capture photos for her niece's grade school class.

NCIS is called in when Navy Chief Warrant Officer Rafi Nazar is suspected of trying to sell stolen classified Navy software used to pilot combat drones.

When a hotshot financial advisor is found shot at a naval station, NCIS investigates the case by interviewing the victim's three-dimensional hologram of herself, which she created before her death.

NCIS investigates the case of a Navy reservist whose body is found in a beat-up car at the end of a gun range. Also, Kasie weighs the pros and cons of buying a gun.

NCIS investigates the death of a man on a cruise ship whose body is discovered in the ship's sauna by none other than McGee's mother-in-law, Judy.

NCIS investigates the death of a beloved Navy commander who trained some of the top athletes in the country.

The NCIS team investigates the death of a Navy commander whose body suddenly explodes before Jimmy can examine it.

Gibbs and McGee head to Alaska while the team works at home to uncover the conspiracy behind the serial killer.

Gibbs and Parker go on a road trip to find one of the serial killer's victims. Also, Agent Knight goes undercover at a large manufacturing company with ties to the murders.

While trying to find the serial killer Gibbs was after, the NCIS team discovers another person has been tracking the case as well.

As the NCIS team searches for Gibbs after wreckage from his boat is discovered, they find out he was tracking a serial killer with journalist Marcie Warren, who wrote an exposé on him.

While pursuing a dangerous arms dealer, the team is shocked when Bishop is implicated in an old NSA leak. Also, Gibbs and Marcie realize the killer they've been tracking may be onto them.

When members of an NCIS Regional Enforcement Action Capabilities Training Team (REACT) are killed during an explosion, NCIS Special Agent Jessica Knight, the lone surviving member, helps crack the case using high tech body armor.

NCIS tracks a stolen laptop to the uncle of a young boy, Phineas, Gibbs' former neighbor.

While the team investigates a biker killed in a hit and run, Gibbs prepares to testify against a financial advisor who stole millions from his Navy clients.

Evidence from the stabbing of a Marine Sergeant leads Torres to meet his father, Miguel, who left when he was a child.

Vance assigns McGee, Torres and Bishop to COVID compliance duty at a foreign affairs summit, where they discover a link to another NCIS team's murder case.

NCIS uncovers a secret dogfighting ring, which leads to an unexpected move by one of the team members.

NCIS dives into the competitive world of food trucks after finding a man frozen to death in the back of one.

When Sloane's name is discovered in Afghanistan at the site of an abandoned bus with a dead driver, Gibbs accompanies her on a trip to find a group of girls who were kidnapped from the bus. Also, McGee, Bishop and Torres track down a hacker who emailed compromising information to the Taliban.

NCIS investigates the murder of a Navy officer who was killed while driving home a recently released inmate. Also, Gibbs helps Palmer deal with a personal trauma.

Following a tip about smuggled weapons, Bishop and Torres engage in a shootout in a former sheriff's residence that's now a historical site, only to find themselves locked in abandoned jail cells there.

Gibbs and Fornell's crusade to find the head of the drug ring responsible for Fornell's daughter Emily's overdose comes to a climax. Also, Gibbs and Vance finally let the team in on a case that has dangerous implications.

McGee and his wife Delilah's (Margo Harshman) Bahamian vacation turns into a high-stakes mission when a case NCIS is tracking of a dead escape room manager has ties to the island. Also, Gibbs fears the worst when his search for Fornell leads to blood.

The discovery of two dead bodies in a forest leads the NCIS team into the wild world of modern-day treasure hunting. Also, Gibbs and Fornell get deeper into their search for the opioid kingpin.

Flashbacks reveal the murder case that first introduced young Gibbs to NCIS and his introduction to young, new-to-America Ducky.

Gibbs and Fornell attempt to track down the leader of a drug ring who supplied drugs to Fornell's daughter. Also, the team deals with the case of a missing cadaver from the NCIS autopsy room.

The team tries to verify the identity of Joe Smith, who claims he served on the U.S.S. Arizona during the attack on Pearl Harbor, and wants to be buried there upon his death.

When Kasie and Jimmy are held hostage in a diner after a jewelry store robbery goes awry, they attempt to keep the other customers safe from the thieves.

The team searches for answers when the body of a well-regarded Navy technician in the Reserves is found floating in a lake where a popular community event is being held. Also, Sloane is caught off-guard when her daughter, Faith, makes an unexpected request.

As the NCIS team investigates the death of a Navy officer murdered the same way as his parents a decade ago, they stumble across a storage container filled with dollhouses that display recreations of murder scenes. Also, the team agrees to clean out their living spaces, but some have a harder time saying goodbye to their possessions than others.

While investigating the suicide of a retired Navy officer who left a rare, valuable – and possibly stolen – coin to the National Museum of the Navy, the team imagines themselves in his life story in order to piece together how the coin ended up in his possession.

The lead suspect in an NCIS murder investigation is a woman Gibbs' friend, Phillip Brooks, met on a dating site. Also, Sloane has a secret admirer on Valentine's Day.

After Torres and Bishop are victims of a hit-and-run, Torres fights for his life in the ICU.

After a body is found at an unmanned aerial vehicle testing site, the NCIS team must determine if the death was murder or an accident. Also, Palmer carefully interviews medical examiner assistant candidates.

The NCIS team investigates an F-18 crash and the subsequent disappearance of the pilot who operated the aircraft. Also, McGee reluctantly discusses a very personal decision with his teammates.

Gibbs must face the reality of his actions after he assists Ziva with "the one thing" she said she would need to take care of before returning to her family.

Gibbs and the team assist Ziva with "the one thing" she said she would need to take care of before returning to her family.

The NCIS team investigates a petty officer's murder that was live-streamed on a popular gaming app. Also, Gibbs watches his 11-year-old neighbor, Phineas, when his mom must leave on a last-minute trip.

The NCIS team investigates the murder of a musician in the Navy's most elite band that performs at diplomatic events around the world.

While investigating a Marine's murder, the NCIS team uncovers a labyrinth of live-streaming spy cameras hidden in the rooms of a Virginia motel.

After a petty officer's son is found murdered at his "welcome home from prison" party, evidence suggests Kasie's lifelong best friend, Dante Brown, is the suspect.

NCIS investigates Marine Corporal Laney Alimonte after evidence suggests she murdered her neighbor while being treated for insomnia by a hypnotherapist. Also, Gibbs befriends his new neighbors after the 9-year-old's baseball crashes through his window.

The NCIS team links a bizarre crime scene at Arlington National Cemetery to a string of attacks on homeless veterans. Also, Vance orders McGee, Bishop and Torres to complete hours of evidence garage cleanup duty for withholding information.

After the body of a Marine Lieutenant is found hidden under an 18-wheeler, the NCIS team tracks the vehicle's previous locations to pinpoint the crime scene and suspect. Also, Sloane encourages the team to sit down and talk about Ziva's recent reappearance.

With their lives in danger, Gibbs and Ziva's rogue investigation takes an unexpected turn when a possible terrorist plot is revealed.

Ziva surprises Gibbs with a cryptic warning, prompting him to question why she remained underground for years while being presumed dead by family and friends, and what led to her return.

Former FBI Agent Tobias Fornell pleads with Gibbs to do whatever is necessary to take down drug dealers and suppliers in the area after his daughter, Emily Fornell, is hospitalized from an opiate overdose. Gibbs is haunted by the personal aspects of the case and his history with vigilante justice.

The NCIS team investigates the murder of a Marine Sergeant in the States who was hailed as a war hero for his efforts overseas. Also, Gibbs turns to Doctor Grace Confalone for advice after he uncharacteristically unravels and abandons his team at a crime scene investigation.

After NCIS finds a secret government bank account that's funding a nationwide network of vigilante justice, the team must determine who is acting as judge and jury.

After entering cold case DNA into the system, Kasie solves a 30-year-old murder case, but a loophole in the legal system may set the suspect free. Also, McGee visits an elite technology company in Silicon Valley that is offering him a highly paid position.

NCIS investigates the murder of a Marine Major believed to have been killed in the 9/11 attack on the Pentagon after human remains are discovered at a construction site. A personal history with the victim drives Gibbs to solve her crime.

Following an active shooter lockdown at a naval hospital, the NCIS team searches for a suspect who fled the scene. Also, someone from Sloane's past was inside the hospital and is a key witness in the case.

Torres relies on his team's investigative skills after he wakes up on a dilapidated fishing boat, covered in blood and unable to remember the last 12 hours.

Director Vance is notified by the Pentagon that the nuclear submarine Gibbs and Bishop are aboard to conduct a murder investigation has gone radio silent.

Jimmy is torn between family and work after his father-in-law, Ed, asks him to tamper with evidence from NCIS' current murder investigation. Also, Ed's poker buddy, Anthony DiNozzo, Sr., offers to help with the case.

The NCIS team investigates a man overboard fatality from a Navy destroyer at sea. Also, Torres is frustrated with Vance's assignment to mentor three high school students.

McGee reluctantly visits his high school after the unique computer password he used as a teenager is linked to the murder of a department of defense contractor. The case escalates when an intruder breaks into McGee's home in an attempt to steal his archaic high school computer.

After a malnourished and confused 9-year-old is found hiding in a storage unit, NCIS reopens an old missing persons case when the girl is believed to be the daughter of a Navy recruit who disappeared 10 years ago. Also, Bishop discovers notes that Special Agent Ziva David kept on the case long after NCIS officially stopped investigating.

An old family friend, Army Corporal John Sydney, beseeches Gibbs to join him on a road trip to search for a missing military I.D. bracelet. Also, a Navy Lieutenant in NCIS protective custody is poisoned by an infamous drug dealer.

United States Secretary of Defense Wynn Crawford shuts down Gibbs' murder investigation and demands that Special Agents McGee and Torres be arrested for their actions in the case.

The team's holiday plans are put on hold when the murder investigation of a Navy veteran includes the discovery of a newborn baby who has no identification and no apparent ties to a family.

When the lead suspect of an unsolved and high-profile robbery case is released from prison, the NCIS team resumes their investigation with an undercover stakeout.

McGee and Bishop travel to Afghanistan after a murder case in the states is linked to a string of soldiers killed by friendly fire overseas. Also, Kasie leaves the lab and accompanies Torres into the field to process additional forensic evidence.

After a mural by a street artist and activist is stolen, the NCIS investigation leads to a conspiracy regarding a Navy contractor and the safety of ocean mammals. Also, Bishop shares a special connection with the street artist.

After NCIS arrives at a Halloween crime scene, Torres recognizes the victim as a friend from federal law enforcement training. Also, Jimmy thinks his lab is haunted by ghosts after objects keep mysteriously moving.

After a 50-year-old tape recording left by a murder victim is found, the NCIS team tries to exonerate Ray Jennings, the Marine serving a life sentence for the crime.

Gibbs' quiet vacation at his remote cabin is interrupted by a surprise visit from Tobias Fornell and Navy Captain Phillip Brooks, as well as a call from NCIS asking for his help locating a robber hiding in the woods near him.

One of the NCIS agents is starstruck after the team investigates an explosion outside the home of Navy Petty Officer First Class Todd Nicholas and his wife, popular reality TV star Sheba Nicholas. Also, Vance continues physical therapy for the injuries sustained when he was held hostage.

After a Navy lieutenant is found murdered in his hot tub, the team interviews several families in the victim's peculiar neighborhood. Also, Torres must face the consequences after a volatile night out with Palmer.

One month after Director Vance was kidnapped, Gibbs is assigned the role of acting director in his absence while the team searches worldwide for his whereabouts.

Sloane is adamant that a man who held her hostage and tortured her years ago in Afghanistan, and was believed to have been killed following her rescue, is alive and in D.C., leading Vance and Gibbs to fear she is willing to risk everything to destroy this man.

While Gibbs attends the memorial service for a friend who was lost at sea, he discovers that the deceased, Navy Captain Phillip Brooks, has been hiding in a fallout shelter after his boat was attacked and he swam to shore.

When evidence reveals an NCIS team member is a hitman's latest target, the team must search through old case files to determine who is seeking vengeance.

Sara Carter begs Gibbs to investigate her mother's murder as she believes the local authorities convicted the wrong man. Also, Abby is awarded a dinner reservation for two to a brand-new five-star restaurant in an igloo and has to decide which coworker deserves to go with her.

NCIS searches for a petty officer suspected of assault who escapes when the sheriff transporting him crashes into a lake; Torres works closely with a blind witness who heard vital evidence needed to solve the case.

Gibbs is granted protective custody of a 10-year-old orphaned refugee, Elena, when an NCIS case reveals she is the target of a violent gang.

The NCIS headquarters are evacuated after the team discovers a body as well as bomb materials on the roof of the squad room. Also, the team reads the first draft of Ducky's book.

Gibbs and Ducky see an antique war stick on television that could be the missing murder weapon to a 16-year-old cold case.

Gibbs and the team work to clear the name of retired Marine Sergeant John Ross when cyanide is found in one of the hundreds of care packages he sends to active-duty Marines.

NCIS strikes a deal with convicted murderer Paul Triff, giving him a 48-hour furlough at his former residence, now McGee's home, in exchange for information that can convict his former cellmate, Gabriel Hicks, the murderer who deceived Gibbs and Fornell.

After the body of a missing Navy commander is found, Vance orders Gibbs and the team to work with former FBI Agent Tobias "T.C." Fornell, the private investigator who was hired to locate him. Also, Bishop and Torres interview convicted investment advisor Albert Hathaway when the victim is linked to his highly publicized trial.

After McGee and Torres visit the home of a high schooler who witnessed a hit and run, her parents, Christopher and Julie Bell, flee with their daughter, leaving NCIS in the lurch. Also, Vance's daughter is arrested for shoplifting.

After a seemingly happy and successful Navy Lieutenant appears to have taken her own life, Gibbs and the team conduct a thorough investigation, interviewing family and friends from her past and present.

Torres and Bishop go undercover as a criminal couple available for hire, during an NCIS sting operation tracking illegal drug-running out of the Norfolk civilian marina.

As Torres and Sloane run protection detail for U.S. Senator John Phillips in Afghanistan for the holidays, they must urgently return to the states after hearing the senator's son is in the ICU. Also, Gibbs and the team investigate the altercation that caused the life threatening injuries to the senator's son.

The team's Thanksgiving plans are put on hold while they track an elusive international arms dealer in D.C. who recently murdered an MI-5 officer who was Sloane's close friend. Also, Abby races Delilah to the hospital when her labor starts three weeks early.

An NCIS person of interest in a bribery and fraud case is found murdered after a runner is led to his body by a strange voice. Also, McGee and Delilah disagree on whether to find out the baby's sex or keep it a surprise.

After a convicted felon swears the NCIS agency framed him for murder a decade ago, Gibbs begins his own investigation, starting with a new autopsy by Ducky. Also, Senior FBI Agent Fornell joins the team, since he was the lead investigator in the original joint FBI and NCIS case.

After a petty officer is found murdered on a golf course, McGee spends hours on the victim's ham radio trying to locate a key witness. Also, Palmer asks his co-workers to donate to a charity that builds playgrounds for kids of all abilities, and Torres surprises them with his generosity.

After Reeves sees his friend get kidnapped, the NCIS team discovers the primary suspect disappeared two days ago with confidential military information. Also, an embarrassing photo from McGee's teenage years becomes a popular meme.

Director Vance welcomes NCIS Special Agent Jacqueline "Jack" Sloane, a forensic psychologist he lobbied to transfer from California, to headquarters. Also, in the midst of a storm that has shut down Washington, D.C. and knocked out power, the NCIS team investigates the kidnapping of a sailor, which sends Torres and Bishop out to sea to track evidence.

While on a stakeout with Metro P.D., Torres' partner mysteriously vanishes, with the subsequent investigation leading NCIS to uncover new evidence from a decade-old murder. Also, Ducky's friend, Cadence Darwin, presents him with a new opportunity during his guest lecture series.

NCIS is called in to investigate when the body of a missing Navy Lieutenant who disappeared a year and a half ago is located by a cemetery grounds crew while they are relocating caskets on the property. Also, Gibbs and McGee must pass a psych evaluation with Doctor Grace Confalone before officially resuming all work responsibilities.

Two months after Gibbs and McGee were last seen fighting an elusive group of rebels in a Paraguay jungle, the NCIS team in D.C. tirelessly searches for their missing colleagues. Also, Vance and Torres are summoned to a congressional hearing regarding the fallout from the Paraguay mission.

Gibbs, McGee and Torres travel to an area of Paraguay controlled by a group of violent rebels in an attempt to locate a missing Navy SEAL who disappeared during an unsanctioned trip.

The stress of McGee and Delilah's imminent wedding takes its toll, as Delilah is rushed to the hospital. Also, the NCIS team travels out to sea after a young and healthy Petty Officer aboard a Navy destroyer dies in his sleep.

After a Marine Sergeant is found murdered in a National Park, Gibbs and the NCIS team partner with Mounted Police Sergeant May Dawson to solve a string of related crimes in the park.

Torres must rely on old case notes and contacts after a Marine's murder is linked to a former dirt bike gang he joined for a year-long undercover operation.

After a vice admiral's laptop is infected with ransomware, he enlists McGee and the NCIS team to track down the hacker before the computer virus eliminates his personal and professional files. Also, Alex takes time off to assist her mother, Marie Quinn, after she receives a "911" text.

When a Marine is murdered at an event for the Honor Flight Network, a non-profit that arranges for veterans to visit the World War II, Korea and Vietnam War Memorials for free, the NCIS team must rely on an irritable Vietnam War veteran, Henry Rogers, to provide details on the victim's whereabouts throughout the day. Also, McGee and Bishop investigate a juicy rumor about Quinn and Torres.

To carry out a sailor's dying wish, Gibbs and the NCIS team re-investigate a murder case that was originally ruled an accidental death. Also, the case reminds Torres of a tragic time from his past.

McGee discovers his apartment has been torn apart by a robber trying to locate an item of great value hidden somewhere by the convicted criminal who previously owned the unit. Also, Congresswoman Flemming tries to persuade Director Vance to pursue a career in politics

Bishop is more determined than ever to seek revenge for the murder of Qasim, her late boyfriend, after Gibbs and the team find a new lead in the Chen case. Also, Torres teaches the agents the art of pickpocketing.

After Abby's homeland security think tank is compromised and she is found in possession of a real bomb, the NCIS team discovers the leader of the group has been murdered and a theoretical terror playbook has been stolen.

The murder of a Petty Officer in a small town outside D.C. prompts NCIS to once again work with "The Sherlocks," a privately funded investigative team that includes their newest member, Anthony DiNozzo, Sr..

While investigating a hit and run, Palmer spots a man on a ledge and attempts to talk him down.

After Gibbs spots the brother of an "NCIS Most Wanted" suspect, he immediately assumes his former alias and goes undercover with their infamous anti-government militia. Also, Bishop and Reeves partner on an off-the-books investigation.

NCIS searches for new leads after an undercover operation to apprehend a businessman who uses acts of terror to manipulate the stock market is compromised. Also, Bishop and Qasim find a break in the case together.

After the NCIS team tracks evidence from the murder of a Navy captain to Ducky's deceased mother, Ducky looks back and questions a pivotal life choice he made 37 years ago. Also, the team exchanges holiday gifts, and Gibbs spends Christmas dinner with Fornell.

The NCIS team investigates a series of escalating threats against congresswoman Jenna Flemming, while Director Vance oversees temporary protection detail.

After NCIS Agent Bishop is sent to Gitmo to gather evidence for a Navy chaplain murder case, she questions her previous work at the NSA. Also, Bishop's brothers, John and Robert, visit for the Thanksgiving holiday and pester her co-workers to find out who she is dating.

Torres boldly breaks protocol when he learns a witness in an NCIS case is wanted by U.S. Immigration and Customs Enforcement. Also, Abby, Bishop and McGee woo landlord Tony DiNozzo Sr. in the hope of subletting Tony's apartment.

After a kidnapped petty officer escapes her captor, NCIS uncovers a connection to her missing husband. Also, Abby knits the NCIS newbies personalized gifts.

When a missing MI6 Officer is linked to a murdered petty officer, Gibbs sends Quinn and Bishop to Philadelphia to work with MI6 Officer Clayton Reeves. Also, Quinn painfully recounts the NCIS case that made her leave field work.

After the body of a navy lieutenant is discovered aboard a destroyer during a tiger cruise, when civilian guests are allowed to spend the night on the ship, Gibbs, Quinn and Palmer travel out to sea to investigate. Also, McGee contemplates the perfect proposal for Delilah Fielding.

When the NCIS team investigates a marine sergeant's tragic fall from a building, her doctor, Grace Confalone, confides in Gibbs and suggests he treat it as a murder investigation. Also, Torres searches for a place to live.

NCIS uncovers a bomb plot and a long-running theft ring while investigating a death at a Quantico reunion. Also Torres and Quinn adjust to life on Gibbs' team, including new seating arrangements in the squad room.

The NCIS team investigates a deadly car explosion in D.C. that connects to NCIS Special Agent Nicholas "Nick" Torres, who disappeared six months ago while on a deep undercover assignment in Argentina. Also, Gibbs asks NCIS Special Agent Alexandra "Alex" Quinn to shadow his team after rejecting eight agents she instructed and referred for the open position.

The NCIS, FBI and MI6 teams continue the international manhunt for a spy who's targeting current and former agents. Anthony DiNozzo bids farewell to NCIS.

The NCIS team, alongside the FBI and MI6, continue an international manhunt for an escaped British spy who has left one colleague fighting for their life in ICU.

When a 14-year-old foils a home invasion, Gibbs suspects the teenager is withholding pertinent details. Also, Director Vance and Senior FBI Agent Fornell travel to London as part of the ongoing escaped British spy case.

NCIS partners with the FBI and Homeland Security when two British prisoners, including a former spy, escape and arrive in the U.S. via a shipping container. Meanwhile, McGee goes apartment hunting and becomes determined to find out how DiNozzo purchased his lavish place.

After Tony's identity is stolen by multiple perpetrators, the fake Special Agent DiNozzos begin blackmailing Senators.

A Navy Public Affairs officer is murdered, and the victim's wife and mistress accuse each other of the crime. Meanwhile, Anthony DiNozzo Sr. helps a homeless woman who believes he is her father.

The team re-examines an ambush on a group of Special Ops snipers six months ago in Iraq, after an American couple is attacked in the same area. When Gibbs discovers he needs the account of the lone survivor, he tries to connect with the wounded warrior who is being treated for PTSS at Walter Reed Medical Center.

Laura San Giacomo returns as Grace Confalone. The episode features a special performance by the MusiCorps Band, part of a music rehabilitation program for wounded veterans.

The NCIS agents' personal plans are interrupted when each of them catches errors in a seemingly cut-and-dried closed case. Also, McGee and Delilah argue over the importance of not discussing work during dinner, while DiNozzo bores his date with shop talk.

Doctor Cyril Taft experiences the rush of an NCIS case after he is assigned surgical duty to Gibb's suspect and finds key evidence. Also, Dinozzo pays Jeanne Benoit a visit as he chases a lead involving doctors in Sudan.

When Secretary of the Navy Sarah Porter learns her daughter has been kidnapped, the NCIS team partners with the FBI to track the case, determine a motive and bring her home. Also, McGee's childhood friend, NCIS Special Agent Valerie Page, is in town to assist the team with advance tactics training.

When a deep sea diver is murdered on the job, his body and suspected co-workers must remain in a high-tech decompression chamber for four days, leaving the NCIS team to complete an unorthodox investigation from outside the tank.

While investigating the murder of a seaman who was set to testify before a grand jury, the NCIS team uncovers the resurgence of an international human-trafficking ring. Also, McGee hopes to spend the night at a colleague's home after a storm causes massive power outages in the city.

After the passengers and crew of a private plane traveling from New Orleans to Washington D.C. are lethally poisoned, all evidence points to the missing chef, Abby's brother, Luca. Gibbs and the D.C. team work in conjunction with Pride and the New Orleans team to locate Luca and determine why a private tech company was targeted, on the first part of a special two-hour crossover event

After Ducky is attacked by a man claiming to have information about his half-brother who died decades ago, the NCIS team searches for the perpetrator, as Ducky recalls the final emotional days he had with his sibling. Also, with the holidays approaching, Bishop and Jake discuss the future of their relationship.

In the hopes of sparing a family further tragedy, the Secretary of the Navy calls on NCIS to help a sailor battling leukemia locate a bone marrow transplant after his two Marine siblings are killed in the line of duty. Also, Bishop returns home to Oklahoma for the Thanksgiving holiday.

In order to clear his name, a petty officer volunteers to be court martialed if NCIS agrees to conduct its own investigation after his murder case is dismissed due to a mishandled warrant. Also, Bishop and Jake discuss their marital problems.

DiNozzo is reunited with his ex-girlfriend, Jeanne Benoit, when insurgents in Sudan attack a group of volunteer doctors, including her husband. DiNozzo and McGee travel to the crime scene for the joint murder and kidnapping case and join the search for the missing doctors.

The NCIS murder case of a retired Navy Lieutenant Commander forces Ducky to reveal his participation in a secret society that solves cold cases.

When a petty officer's murder matches the M.O. of a local serial killer, the NCIS team must determine if this is the killer's latest victim or the work of a copycat. Also, McGee and Delilah must learn to compromise before moving in together.

While visiting a pharmaceutical lab on a murder case, Abby is trapped with no communication to the outside world after armed men take over the building and hold everyone hostage.

Vance partners with Gibbs and returns to field duty when a murder case is connected to a former NCIS agent he locked up for stealing evidence.

After a Marine is found murdered in Quantico hours after calling Gibbs to discuss a possible case, Bishop and McGee go undercover as a married couple to run surveillance on a Marine Lieutenant and his wife.

With a case that keeps going cold, but DiNozzo discovers there is more to Gibbs' personal connection to the agent and his desire to help him succeed. Also, the team gossips about Gibbs' new look after he replaces his standard military haircut and polo shirt for a modern cut and tailored dress shirt.

Gibbs fights for his life aboard a Navy hospital ship after being shot, while DiNozzo and Joanna Teague travel to Shanghai to try and take down the Calling.

NCIS feverishly investigates a global terrorist group that is recruiting teens via the Internet following a deadly bombing overseas that results in an emotional and surprising loss for the team.

The NCIS cyber case turns into a united global effort after evidence confirms "The Calling," an international terrorist group that recruits children through the internet, has been purchasing S-bombs off the black market.

Special Agent Ned Dorneget from NCIS cyber operations assists the team when a Navy ensign who worked in the Office of Naval Intelligence is murdered. Also, the team discovers that Jake and Gibbs have become good friends.

Gibbs and Bishop travel to Afghanistan after the murder of a Marine in D.C. is linked to a terror group holding another Marine hostage overseas. Also, DiNozzo is upset that McGee was chosen to be the new face of NCIS for all recruitment brochures.

DiNozzo is partnered with his girlfriend ATF Special Agent Zoé Keates after evidence reveals that the murder weapon in an NCIS case was originally purchased for the controversial ATF sting operation "Operation Fast and Furious." Also, Anthony DiNozzo Sr. returns to town for a special dinner to meet his son's girlfriend.

The murder of a petty officer sparks a lead in a 40 year old airport bombing cold case that Gibbs and DiNozzo have been assigned to for the past two years. Also, McGee is jealous that he was not previously briefed on the cold case.

After the body of a thief is found in a Marine's house, NCIS discovers the calling card of a terror group Delilah and the Department of Defense have been tracking.

Evidence in an NCIS murder case reveals a rare painting on loan had been swapped for a fake, prompting DiNozzo, Sr. to share his knowledge and contacts of the black market art world with the team.

Covert identity created for one of Gibbs' undercover cases 20 years ago resurfaces after a murder victim is found living under the alias.

The NCIS team suspects Gibbs' arch-nemesis is behind an explosion at a summit for global terror event, but Gibbs elects to sit out the investigation in order to help a grief-stricken Fornell, whose life is on the verge of imploding following his wife's murder.

DiNozzo returns to the military academy he attended as a teenager after a murdered Marine and alumni of the school is found clutching the photo of a current student. Also, Bishop and her husband invite Gibbs and the team out for a special dinner.

Gibbs and the team investigate when a Navy lieutenant who is set to be the first openly gay servicemember to receive the Medal of Honor is murdered. Also, as his wife's due date approaches, Palmer prepares for fatherhood with a NCIS baby shower.

The NCIS team searches for a home-grown terrorist after a rescue mission in Syria reveals an American was involved in the capture of a social worker. Meanwhile, McGee and Bishop question DiNozzo's unusual behavior.

The NCIS team must investigate a series of crime scenes that appear to be copy-cats of previous cases. Also, two of Gibbs' ex-wives, one of which the team has yet to meet, show up at a crime scene to discuss something important with him.

The NCIS team consults with three cyber-terrorists they imprisoned after a city-wide Internet shutdown the week before Christmas. Also, McGee reflects on the case and Gibbs' infamous rules as he pens a heartfelt letter to his father.

While stuck at the Dulles airport due to inclement weather, DiNozzo, Bishop and her husband Jake work an NCIS case involving an elevated terrorist threat at Northeast airports during the Thanksgiving travel surge.

While the NCIS team investigates the cause of a hit and run accident that resulted in the death of a Petty Officer, Gibbs searches for a way to clear a Navy Hospital Corpsman, who has served two medical tours in Afghanistan, after she's indicted for illegally providing medical aid to the victims of the crash, even though the surviving victims swear by her life-saving techniques.

After investigating the murder of a retired Master Sergeant, the NCIS team uncovers a fraudulent charity that preys on those searching for missing military personnel. Meanwhile, Bishop agonizes over the results of her probation evaluation, and Tony contemplates adopting a stray cat that followed him home.

The NCIS team must determine if the murder of a Navy commander's wife is linked to her profession as a therapist or an act of terrorism after finding the commander's name on a Jihadist target list. Meanwhile, the team discusses Halloween costumes and Tony's recent dating habits.

During a joint Coast Guard and NCIS training exercise at sea, Gibbs and CGIS Agent Borin spot a deceased man overboard, who is discovered to be a missing crew member from a ship 60 nautical miles away. Upon boarding the ship for questioning, Gibbs finds himself on a vessel that has been commandeered by pirates.

The Secretary of the Navy assigns the NCIS team to a joint terrorism task force after a Naval research scientist is murdered and the lead suspect is wanted by the Russian government. In order to get a jump on the case, Gibbs has DiNozzo run interference with the leader of the task force, FBI Agent Leia Pendergast.

When an NCIS case reveals a connection to Ducky's estranged childhood best friend, he and Special Agent Bishop travel to London for interviews with family and co-workers of his friend. While there, Ducky finds himself reminiscing about the choices he made in his past and the subsequent impact they had on his adult life.

When a Navy Lieutenant is killed on his way to a private meeting with the President, the NCIS team must determine if the murder was part of a recent stream of muggings in the area or a targeted hit to keep intel secret.

Gibbs and McGee travel to Russia to safely escort home an NCIS computer engineer connected to classified intel, but their mission is compromised and they are forced to go off the grid while hunted by a Russian mercenary group. Meanwhile, the team in D.C. frantically uses every asset and inter-agency contact they have in an attempt to locate their missing team members

The NCIS team investigates whether a fire on a U.S. Navy ship that served as a secret detention site for indicted terrorists was accidental or an intentional diversion for an escape. Meanwhile, Gibbs travels to his childhood home following news of his father's passing.

Director Vance gives DiNozzo a special assignment to bring home an Admiral's daughter from Paris, but he must turn to his NCIS team for help after he enters a controversial crime scene.

When a Marine photographer disappears prior to providing his testimony in an Army court-martial hearing, the NCIS team investigates both the murder he witnessed as well as his current piece on military veterans who are homeless in the D.C. area. Meanwhile, Abby tries to help a young homeless woman reconnect with her family.

After a Navy officer is found dead on a rural road, the NCIS team must ascertain if the murder was the result of a bar fight or because he knew too much about an attack on a fellow female officer. Meanwhile, DiNozzo and McGee start a juice cleanse to purge their bodies of impurities.

After returning to her job at the Department of Defense, McGee's girlfriend Delilah finds a break in a controversial case, prompting her to turn to the NCIS team for help. Meanwhile, McGee talks to DiNozzo about whether he should ask Delilah to move in.

Gibbs and Special Agent Pride chase leads in New Orleans after evidence points to a copycat of the infamous Privileged Killer. Meanwhile, Bishop sends DiNozzo a special souvenir from the Crescent City, as DiNozzo, McGee and the FBI continue to track political connections to the case from D.C.

When the body of Congressman Dan McLane, a former NCIS agent, washes ashore in New Orleans, Gibbs reunites with his former colleague, NCIS Special Agent Dwayne Cassius Pride, in a joint case between the two field offices and the FBI. The teams must work together to determine if the murder was politically based or linked to McLane's most well-known case, the arrest of the Privileged Killer, a serial murderer who targeted military and public servants.

After a bomb detonates in the dressing room at a military charity concert, the NCIS team must determine if the target was a washed-up '80s rocker or if the bomb was part of a larger scheme. Meanwhile, Jimmy prepares for fatherhood.

When DiNozzo confronts a man impersonating a Navy officer, guns are drawn and the perpetrator is left dead. The subsequent investigation uncovers that the only eyewitness is DiNozzo's father, who is in town to disclose a secret to his son.

After uncovering faulty bulletproof vests in a truck filled with stolen U.S.M.C. merchandise, the NCIS team attempts to locate both the source and any vests that had been shipped to military personnel overseas.

The murder of a port authority officer reveals Parsa's possible whereabouts, as the team continues their tireless hunt. Meanwhile, Bishop reveals her past association with the elusive terrorist.

In an effort to find the terrorist Parsa, Gibbs and the NCIS team track down one of his cohorts using evidence from the drone attack. Meanwhile, an emotionally shaken McGee struggles with the ramifications of the incident.

When a stolen drone is linked to the elusive terrorist Parsa, the NCIS team partners with the Department of Defense, including Gibb's former girlfriend Hollis Mann, to track down the device before it is used for a large scale attack. Meanwhile, McGee hesitates to ask for time off to attend a black-tie gala honoring his girlfriend.

After a mysterious illness strikes children from military families, Gibbs and the team investigate the cause. Meanwhile, Abby and Jimmy partner with the Naval Medical Research Center to determine the strain of illness, all in hopes of delivering a cure before the holidays. Also, Director Vance struggles with forgiveness as his estranged father-in-law makes a surprise visit to his home.

Complications arise when the NCIS team discovers a link between a murder victim and the current boyfriend of Gibbs and Agent Fornell's ex-wife. Meanwhile, NSA Analyst Ellie Bishop adjusts to joining the NCIS team.

After discovering the Secretary of the Navy was bugged during a confidential briefing, NSA Analyst Eleanor "Ellie" Bishop, who predicted the security breach in exact detail two years ago, partners with the NCIS team on the case.

The NCIS team is forced to re-examine a hit-and-run murder case when a former FBI agent turned lawyer confides in Gibbs that her client's confidential alibi is solid. Meanwhile, McGee grows suspicious of Tony's strange behavior.

After Gibbs leaves mid-case to help his father reconnect with a former war pilot, Tony and McGee argue over who should run lead on the team's investigation into the murder of a Marine Sergeant.

NCIS partners with the Coast Guard Investigative Service to investigate a suspicious explosion on board an oil rig. Meanwhile, no one is safe from a mysterious prankster who is targeting the NCIS team.

DiNozzo returns to his Baltimore Police Department days when he sees a felony suspect from a 15-year-old case at the NCIS crime scene of a murdered Petty Officer.

Gibbs and McGee travel to Afghanistan when a murder case leads them to an Afghan women's shelter Mike Frank's secretly supported for years.

The NCIS team must rely on Twitter for a case involving a missing Navy Lieutenant. Meanwhile, McGee misplaces his badge but withholds the information from Gibbs and the authorities.

Determined to locate Ziva, Tony chases leads in Israel in search of her current whereabouts. Meanwhile, Gibbs and the team continue the hunt for Parsa and his growing terrorist ring.

An explosion at a D.C. event that results in a casualty connected to the agency changes Parsons' perspective on Gibbs and the NCIS team. Meanwhile, without badges, DiNozzo and McGee investigate the case as civilians, despite the case's dangerous ties to each of them.

The international manhunt for Eli David and Jackie Vance's killer turns into a federal witch hunt against Gibbs and the team, which questions their unconventional methods and threatens their future at the agency,.

Department of Defense investigator scrutinizes the NCIS team's response to the Bodnar case involving the murder of Ziva's father and Vance's wife. Meanwhile, the team examines whether a Petty Officer is suffering from paranoia or if his claims of being followed are tied to a matter of national security.

In retaliation for the murders of Eli David and Jackie Vance, the NCIS team feverishly searches for Bodnar despite orders from Homeland Security to relinquish the case.

While the NCIS team investigates the murder of a Mossad officer in Virginia, Tony and Ziva depart for Berlin as they track her father's killer.

When a Navy reservist returns home to find her husband missing and her living room covered in blood, she turns to the NCIS team to bring him home. Meanwhile, Tony suspects that Ziva is planning a risky move to avenge her father's death.

Massive storm brings the NCIS team aboard the USS Borealis, where everyone becomes a suspect once the crime scene proves that Mother Nature wasn't the only culprit. Tension builds when McGee discovers that his estranged father, Navy Admiral John McGee, was on board during the incident.

The wife of a Marine who specialized in K-9 bomb detection urges the NCIS team to investigate the recent death of her husband in Afghanistan. Meanwhile, Director Vance asks for the team's assistance as he interviews nannies.

Media frenzy surrounding an unidentified criminal prompts Gibbs' barber to question his son's involvement and ask for Gibbs' help in ruling out his son as a prime suspect.

The NCIS team races to track down Ducky and Jimmy after the two disappear while transporting a body from a crime scene.

On leave from NCIS while still grieving the loss of his wife and his kids' mother, Director Vance discovers unexpected personal information that causes him to question everything.

The NCIS team takes on a renowned hacker who could hold the key to tracking down the most-wanted cyber-terrorist in the world.

The NCIS team investigates a Marine's car accident and ignites some upsetting past memories for Abby as a young girl on the trail of her first "case".

In the aftermath of an event that strikes close to home, the NCIS team unites to seek answers and demand justice in order to protect their most vulnerable colleagues.

While the NCIS team investigates the link to a dead journalist and a Navy petty officer, Ziva is taken aback by the sudden emotional visit by her father, who she hasn't seen in more than two years. While Ziva questions the purpose of her father's visit as the Director of Mossad, her father insists he is in the U.S. strictly to see his daughter for Shabbat dinner.

It's Christmas time and Tony DiNozzo can't decide if he'll be naughty or nice when his dad, Anthony DiNozzo, Sr., comes to town for a visit. Meanwhile, the NCIS team is "following the money" in order to solve a murder investigation, and Abby is bursting with excitement over all the holiday festivities.

Gibbs teams up with FBI Agent Fornell on a joint NCIS/FBI investigation after Fornell becomes the target of a shooting, but they face an unexpected twist in the case when their mutual ex-wife, Diane Sterling, gets involved. Meanwhile, rumors run wild among the group after Diane stays overnight at McGee's.

As the NCIS team investigates a teenage girl's abduction, Ziva and Abby work closely with her young friend who witnessed the kidnapping. As the investigation unfolds, Gibbs seeks help from a past contact, Miranda Pennebaker, a well-connected woman with questionable morals. Meanwhile, Tony gets jealous when he learns Ziva is making plans with a mysterious man.

Gibbs continues to work with Captain Wescott while he retraces his steps in order to help the NCIS team track down a terrorist. With Thanksgiving on the horizon, Abby's enthusiasm for the NCIS family dinner is building, and Tony's curiosity is peaking when he learns Ziva is making special plans for the opera.

When a Navy Lieutenant who recently returned home from the Middle East is found dead from a brutal attack, the NCIS team questions the victim's friend, Marine Captain Joe Wescott. Gibbs realizes the Captain is suffering from post-traumatic stress disorder, but knows his experience overseas may also provide a key link to the crime.

Petty officer is gunned down in a billionaire's Ferrari and the investigation leads the NCIS team to discover a link to a man Gibbs was named after.

When a helicopter crew is adrift at sea and later discovered on shore, the NCIS team must determine the cause of the crash and locate the missing pilot. Meanwhile, Tony and McGee channel their inner "Maverick" and "Iceman," a la "Top Gun," and Ziva challenges them to a dare.

While on medical leave, Ducky orders the exhumation of a Navy commander's body from a case closed 12 years ago. As a result, Gibbs tasks Ducky with a slightly different role on the investigation. Meanwhile, the NCIS team investigates the recent death of a Marine. As both cases unfold, the team begins to question whether the two are somehow connected.

When the body of a missing NCIS facilities manager is found four months after disappearing on the day of the Navy Yard bombings, the NCIS team is assigned to investigate the strange case for one of their own. Meanwhile, the team is required to complete mandatory psych evaluations with a crisis counselor, and Gibbs is most concerned about Abby's recurring nightmares since the bombing.

Harper Dearing's latest act of terrorism ripped through NCIS headquarters in last season's cliffhanger finale, sparking a cross-agency manhunt for the criminal mastermind.

Terrorism threatens to shake the foundations of the Navy and NCIS, when the team continues to be eluded by the newest member of the NCIS Most Wanted Wall. Meanwhile, Jimmy Palmer's destination wedding is impacted by the case.

The NCIS team analyzes what secrets could be in the hands of a terrorist targeting the Navy when a high-tech bug is found inside a probationary agent's tooth. Meanwhile, the festivities for Jimmy Palmer's upcoming wedding continue with the bachelor party.

The NCIS investigation of a fire on a Navy vessel reveals evidence that elevates security at all U.S. Navy facilities worldwide. Meanwhile, DiNozzo and Ziva travel to Italy when an explosive device is found hidden on a Navy ship.

After a warehouse fire reveals missing Navy documents, posing a potential threat to national security, the NCIS team joins the Baltimore P.D. investigation, reuniting Tony with a boy from his past.

Following the murder of a Marine, Tony and Ziva join Ziva's longtime friend and mentor in Columbia in a search for a missing Marine Lieutenant and Navy Chaplain. Meanwhile, Jimmy Palmer decides who will be his best man.

Director Vance's brother-in-law is the lead suspect when Gibbs and the NCIS team investigate the murder of a petty officer.

The Secretary of the Navy partners Gibbs with Dr. Samantha Ryan after top secret information is leaked by someone on the inside.

Top-secret clearance from a Naval research laboratory is jeopardized when the murder of a Chief Petty Officer is connected to an international arms dealer. Meanwhile, Probationary Agent Ned Dorneget tries to butter up Gibbs in hopes of joining the team.

When a high-level security Navy reservist is found dead, Gibbs goes face-to-face with Dr. Samantha Ryan of the PsyOps Division to uncover the truth behind the potential suicide. Meanwhile, DiNozzo argues with accounting after seeing McGee's paycheck.

When a Navy captain is found dead with an unusual costume hidden under his uniform, NCIS uncovers a secret society of real-life super heroes and must track down the villain.

During a routine stop for his morning coffee, Gibbs finds himself staring down the barrel of a gun, forcing him to question choices he has made in the past and present.

When a Navy lieutenant commander is found dead in a building under construction, NCIS must search for a killer while dealing with interruptions from her distraught detective husband. Meanwhile, Ray's return has Ziva thinking about her future.

The investigation into the murder of a Navy Commander leads the NCIS team to E.J. Barrett's whereabouts.

When a Navy captain is killed in a hotel room, NCIS must track down and protect his very pregnant companion from unknown assailants. Meanwhile, Jimmy has problems of his own when he brings his future father-in-law to work.

After Anthony DiNozzo, Sr. is found in a car with a dead body in the trunk and no memory of the previous night, the NCIS team must figure out if he is capable of murder. Meanwhile, Tony is sidelined for this case and must go against orders to try and prove his father's innocence.

As the NCIS team continues its search for a missing Marine, Gibbs and Ziva travel to her last known whereabouts in Afghanistan. Meanwhile, Tony reveals his deepest fears and Gibbs is forced to relive events from his past.

The NCIS team uncovers a discrepancy with DNA remains when investigating the crash of a military plane that had been transporting caskets.

The NCIS team searches for answers when the current husband of both Gibbs's and Fornell's ex-wife is suspiciously kidnapped.

An NCIS case changes from accidental death to murder when evidence reveals that a Navy lieutenant died of forced over-hydration. Meanwhile, Gibbs meets Ducky's new love interest.

When a coast guard officer is gunned down on a cargo vessel, the NCIS team searches for the killer, but finds a Lebanese family seeking refuge on American soil. Meanwhile, Tony and McGee try and find the perfect woman for Gibbs.

The NCIS team searches for the person and motive behind a contract killer targeting a Navy Lieutenant Commander. Meanwhile, Abby uncovers new information about her family after undergoing tests for a kidney donation.

The line between McGee's personal and professional life is blurred when NCIS uncovers a connection between his grandmother and the murder of a Navy lieutenant.

The NCIS team uncovers a startling surprise after a young Marine shows up to his homecoming party with a fatal stab wound.

After spending months tracking down his target, Tony is left with the blood of an NCIS agent on his hands and it's up to Gibbs to help him put the pieces of the puzzle together.

The lives of NCIS members are in jeopardy when they come face-to-face with the infamous Port-to-Port killer.

After new evidence reveals that the Port-to-Port killer has infiltrated the agency, the NCIS teams chase every lead in a race to track him down.

After Tony's ex-partner, Danny Price, appears to be the Port-to-Port Killer's latest victim, he revisits his days as a detective in Baltimore, including his first encounter with Gibbs.

The NCIS team tracks a Navy lieutenant's killer after a Pentagon security camera reveals a petty officer committing the crime. Meanwhile, Gibbs announces that Agent Barrett and her team will take over the Port-to-Port serial killer case.

To Gibbs' displeasure, Special Agent E.J. Barrett returns to lead the investigation of a seaman's death that may be connected to a series of port-related murders. Meanwhile, Ziva finally introduces her boyfriend, Ray, to the team.

Connects a message in blood left by a murdered Navy commander to a manuscript that may contain classified military information.

Gibbs questions Vance's motives when he is asked to interrogate a teenage boy accused of killing his retired Marine father.

Discovers that one of its former investigative assistants found brutally stabbed to death was selling details for how to rob a warehouse full of valuable possessions belonging to a woman convicted of fraud. Meanwhile, a new special agent joins the office.

The dismembered fingertips and teeth of a murdered Marine are discovered in the stolen purse of a pickpocketer, launching NCIS on a mission to find a cold-blooded killer.

Botched assassination attempt in Belgravia forces NCIS to protect the Defense Minister's daughter, who is studying in the U.S. and smitten with McGee. Meanwhile, Gibbs investigates the death of the U.S. Marine who was killed in the bombing.

The NCIS team undergoes mandatory psych evaluations while investigating the death of a naval commander.

The NCIS team springs into action to find the assailant responsible for beating a Marine to death in his own backyard.

Petty officer's recruitment session at a college fair comes to a fatal end, prompting the NCIS team, accompanied by Dr. Mallard's predecessor, to solve his murder.

Gibbs and the NCIS team partner with a Coast Guard Investigative Service Agent to solve the murder of a Marine gunned down on a dinner boat.

The NCIS team investigates the disappearance of a Navy petty officer who is the sole witness in an upcoming murder trial.

The team scrambles for answers after a shocking ambush reveals a new twist to their current investigation.

The team is assigned to protect Ziva's father, when his attendance at a NCIS conference leads to some unexpected surprises,.

DiNozzo's father returns, playing a vital role in a murder investigation that could have catastrophic results.

Delving into the mind of a brilliant Naval Scientist, Abby becomes fixated on solving her murder, while DiNozzo's latest fling leads to an interesting Halloween.

When a controversial DJ and a Naval Officer are shot to death, the team uncovers a sinister plan.

When the body of an American officer is connected to a British Navy vessel, murder turns into an international incident.

When the motives behind an attack on a female bomb tech link her to a murder, the NCIS team investigates her very guarded personal life.

Young girl's kidnapping turns into much more when her grandfather complicates the investigation.

With Paloma Reynosa still on the loose, Gibbs must take desperate measures to protect the ones he loves.

Gibbs heads to Mexico to face his demons and make a startling decision.

When a colleague's murder sends shockwaves through the team, Gibbs uncovers a surprising link to the crime.

The team tries to track down a serial killer, while Abby heads south of the border to give a speech with McGee in tow.

DiNozzo finds himself increasingly captivated by a woman he's never met while investigating the murder of her brother.

When an NCIS polygraph specialist's night job takes a dangerous turn, Gibbs, Fornell and the team have to uncover the truth.

The death of a Navy officer leads Gibbs and the team into the world of high-priced call girls, relying on D.C. Madam Holly Snow to help them catch a killer.

The team discovers striking similarities between themselves and their CGIS counterparts when a Navy diver seeking sunken treasure is found dead.

The team investigates the shooting of a Marine and uncovers more to his life than anyone would have ever imagined.

Secrets arise when Gibbs' former mother-in-law surfaces as a witness in a murder investigation.

When a Marine is found dead, Gibbs, Fornell and the team hit the open road to bust an illegal trucking operation.

The team finds themselves in a race against time when a terrorist group threatens to detonate a "dirty bomb" in the D.C. area.

When the government's star witness in an embezzlement case is targeted by an assassin, it's up to the team to help her make it home alive.

Gibbs questions DiNozzo's ability to do his job when the elder DiNozzo becomes involved in their latest investigation.

When a Navy pilot is found dead under strange circumstances in a secluded area, the team finds themselves battling a no-nonsense attorney with a hidden agenda.

When the enlisted son of retired Colonel-turned-preacher is found dead, the team believes he may be the victim of a hate crime. Meanwhile, Gibbs' father comes for a holiday visit.

A dead Marine's day job at a government think tank leads Gibbs and the team into the life of a 12-year-old prodigy who may be the killer's next target.

The team literally finds themselves in the dark when the investigation into the death of a lieutenant is connected to a city-wide blackout.

With the team's help, Vance faces his demons while uncovering a complex relationship with a killer that puts his whole family in danger.

Murder investigation prompts Gibbs and the team to play family counselor to his former mentor, Mike Franks, in the hopes of preventing a bloody international conflict.

When a Marine known for his practical jokes is found dead on Halloween eve, the NCIS team discovers that the victim's "good-natured" pranks may have inspired ghoulish retribution. Meanwhile, Ziva tries to adjust to her new role on the team.

When a Marine's body surfaces halfway around the world, the investigation forces Ziva to dig up a buried chapter of her life.

The team must take a second look into the death of a lieutenant after the blogger who accused them of a cover-up ends up dead on NCIS.

The team discovers the bizarre death of a Marine and his two friends may be linked to their past, but its Gibbs who ends up taking a trip down memory lane.

As the hunt for Ziva's replacement begins, Gibbs and his remaining team members must head back to work with the past still weighing heavily on their minds.

Ziva's homecoming to Israel with Gibbs and the team is not a happy reunion with her father, the enigmatic and powerful head of Mossad. As tensions rise, Gibbs is forced to make a decision that sends shockwaves through NCIS.

After a security breach at the SecNav's residence leads to the death of an ICE agent, Gibbs and the team are forced to work with ICE and the FBI to find his killer. Meanwhile, Tony finally comes face-to-face with Michael Rivkin.

With the appearance of Mossad agent Michael Rivkin, Tony is forced to question Ziva's loyalty to NCIS. Meanwhile, in Los Angeles, Special Agent Callen goes undercover to try to catch a terrorist cell while OSP psychologist Nate Getz discovers the startling truth about Gibbs and Special Agent Lara Macy's relationship.

The body of a Marine leads Gibbs and McGee to the NCIS OSP division in Los Angeles, where a murder investigation quickly climbs to a matter of national security in which the two offices must work together to resolve. Meanwhile, Tony begins to snoop into Ziva's personal life.

When a government scientist goes missing, Abby is recruited to carry on his work, but the team worries that she may meet the same fate as her predecessor.

Gibbs and the team must work with the shady Trent Kort to put away one of NCIS's most wanted.

When a young boy finds a murder weapon, the team must trace ownership of the gun to find who used it last and who was murdered.

Boxer's death leads Vance to start up his own investigation, causing a sparring match with Gibbs.

The death of a NCIS agent leads Gibbs and Tony into the desert to locate a woman who holds the answer to the mystery.

Gibbs and DiNozzo reverse roles after a murder leads to one of Tony's old investigations being re-opened.

While investigating the death of a Marine, the team finds themselves intertwined in an inner city gang war.

Slain sergeant's private life is on full display as the team must determine if a suspected act of treason lead to his death.

After Ducky is stabbed at a crime scene, the team uncovers disturbing secrets from the good doctor's past.

McGee is held captive in a women's prison after a guard's murder leads to a takeover.

While stuck working on a case over Christmas, the team searches for a suspect presumed dead.and begins to discover some startling personal revelations.

After a petty officer dies in a car crash, the team suspects foul play when their investigation leads them into the violent world of underground street fighting.

The team must rely on information from some questionable individuals to stop a criminal bent on stealing government secrets.

Shocking revelation comes to light after the team is forced into playing a dangerous war game.

Gibbs second-guesses his own judgment when Vance assigns him a rookie to aid his team's investigation into a deadly bank robbery.

During the week of Halloween, a murderous psychopath taunts the team by using the Internet to leave clues to the next victim's identity.

The hunt for a marine's murderer puts Gibbs on a collision course with an old friend, FBI Agent Fornell.

After two Marines are ambushed, the NCIS team finds the investigation leads back to Gibbs' hometown, where secrets about his past are revealed.

The NCIS team becomes entangled in the world of Washington politics when a distinguished Senator turns to Gibbs for help in solving the murder of a young, female Naval officer.

While stationed on an aircraft carrier, DiNozzo finds that a Navy Lieutenant's apparent suicide may be connected to a larger, deadly scheme.

The murder of a Naval Petty Officer leads Gibbs to uncover a shocking connection between the case and Director Vance's decision to disband his team.

As NCIS struggles to come to terms with the news that one of their own is dead, Gibbs and the NCIS team attempt to find a motive for the killing while trying to deal with their own emotions over what's happened.

When a former NCIS Special Agent is found dead in a swimming pool at his home in Los Angeles, Jenny, Tony and Ziva travel to Los Angeles to attend the dead Agent's funeral. An encounter at the dead former agent's memorial service has Jenny greatly unnerved and soon realizing that the agent's death may not have been natural after all, prompting her to bring in an ally of the NCIS team to help out. As Jenny and Mike dig deeper into the case, they're unaware of the fact that the same group of assassins that killed the NCIS agent are after them while Tony and Ziva attempt to find Jenny who has ditched them while they were in Los Angeles but tragedy lies in wait and it's something that threatens to change the structure of the NCIS agency forever...

Jimmy Palmer becomes the target of a mysterious killer who only he can recognize.

Ziva's undercover assignment takes a shocking and deadly turn when the serial killer she has been tracking becomes suspicious of her.

When a mortar attack in Baghdad turns into a murder investigation, two members of the NCIS team are sent to Iraq to solve the case.

When the dead body of arms dealer La Grenouille surfaces, the NCIS team is put under investigation for his murder by the FBI and Jenny Shepard becomes the prime suspect.

When the NCIS team investigates a fatal dog mauling, Abby puts her career on the line to prove the dog's innocence in order to save his life. Meanwhile, Gibbs zeroes in on the secret Jenny is keeping.

When a high-tech naval radar goes missing, the NCIS team stakes out a warehouse to catch a suspected thief - but witnesses a murder instead. Meanwhile, Ducky keeps a secret from the team.

The NCIS team investigates when a Muslim Marine is found dead near a Mosque that is suspected by the FBI of terrorist recruitment. Their search is delayed when Ducky refuses to autopsy the Marine in deference to his family's religious beliefs.

The NCIS team pays a heavy price when they try to track down a Marine who believes he is still in Iraq. After a violent confrontation, the team realizes the Marine is the subject of a secret experiment.

The NCIS team plays babysitter to a 9-year-old boy whose father is wanted in connection with a cold case murder. Their search for the man, a trained survivalist, leads them into the wilderness where they discover the startling truth about his past.

The NCIS team's investigation into the assassination of a Navy Admiral takes an unexpected and emotional turn when they meet a woman searching for her missing husband, a political refugee from Africa.

When Gibbs agrees to help the childhood friend of his daughter, who died 15 years ago, he finds himself at the center of an emotional and soul searching journey into his past, which leads to a shocking and heart-stopping conclusion.

Gibbs and the team investigate a mysterious death aboard a top-secret naval research ship in the middle of the ocean, only to discover an abandoned ship and a deadly secret that could cost them their lives.

When the NCIS team is called in to talk a distraught naval officer from jumping off a rooftop, what starts out as an attempted suicide turns into a murder investigation for Gibbs and team.

Gibbs and his team identify a cadaver, mistakenly tagged a "John Doe," as a career felon with ties to a criminal mastermind capable of erasing unsavory pasts.

Gibbs and Lt. Mann unite for a joint investigation into the murder of a Marine Captain who had access to highly classified information. Things become complicated for Gibbs when a witness in the case turns out to be his ex-wife.

In autopsy, Ducky makes a startling discovery that leads to the search for a missing child. Meanwhile, Tony struggles to deal with his feelings for Jeanne.

The final showdown between the NCIS team and an elusive arms dealer reaches an explosive and deadly conclusion.

As the NCIS Director returns from a controversial European junket, and Gibbs and his agents reluctantly prepare for hastily announced Homeland Security polygraph tests, tightly woven secrets among the team unravel, revealing the biggest surprise in this Season of Secrets. In addition, an unarmed Dinozzo and his girlfriend are held captive by a merciless drug-dealer.

Gibbs ignores the bureaucratic paperwork associated with his "acting" director duties and leads an investigation for a murder victim found in a taxi headed to NCIS headquarters. Meanwhile, Jenny discovers a secret about her past.

With little evidence, the team turns to Scott to re-create the scene of the crime using his heightened senses of hearing and scent to track down the Petty Officer's killer. Meanwhile, Tony and Gibbs struggle with personal relationships.

Director Shepard takes a huge risk and agrees to meet an informant alone, but the meeting goes bad and her contact is killed. Gibbs and the NCIS team attempt to gather the information the man was going to supply or risk losing their nemesis once again.

McGee is horrified when a Petty Officer on whom he based the character for his latest book is murdered. With little to go on, the team pushes McGee to figure out who could have accessed his secret manuscript.

The NCIS team discovers a tip about terrorist activity was a trap that resulted in the death of two agents. Blaming herself, Agent Cassidy works with the NCIS team to track down the people responsible.

With the young Marine on life support, the NCIS team tracks his movements in the days before he was left for dead and discovers a secret trip to Baghdad via a private cargo plane and a link to Gibbs' past.

Gibbs and the team look for a potential serial killer when an explosion at a military cemetery mausoleum reveals a cache of dismembered human remains.

The NCIS team suspects foul play when a Navy Lieutenant is the victim of radiation poisoning.

The NCIS team investigates when the body of a young sailor is found in an abandoned building in a seedy part of town.

Ducky comes out of the autopsy room and goes undercover to stop the illegal sale of the Navy's top secret weapons system.

The NCIS team must track down a wanted terrorist who has obtained a missing, highly toxic chemical weapon.

The NCIS team investigates when a high-level Marine intelligence officer is found murdered in a small town motel room.

The NCIS team investigates the death of a Navy Lieutenant who was working on a high level project for the Department of Defense.

The NCIS team is called in when the burnt and mummified body of a wanted man is found in a furnace on a Marine base.

Forgoing NCIS procedure, McGee risks his career when he takes matters into his own hands after his sister appears at his door bloodied and confused.

When suspicious activity surrounds the death of a decorated Marine veteran, the NCIS team works to clear his name.

Gibbs and the team investigate a suspected terrorist attack at a military country club that kills a Marine Colonel.

Gibbs and the NCIS team investigate when a Marine is attacked in his home and his daughter is apparently kidnapped on Halloween night.

The NCIS team is called to investigate when a real estate agent finds the body of a missing Lance Corporal is found in a vacant house.

Gibbs and the team investigate when the body of a Petty Officer is found in a car shot at close range.

The NCIS team is called to investigate a bloody, abandoned car registered to a missing Navy lieutenant.

Gibbs is temporarily reinstated at NCIS when his friend's life is threatened by an escaped convict.

With Gibbs retired and boat-building in Mexico, the NCIS team must learn to work without him when Ziva is wanted by the FBI after she witnesses a political assassination.

While Gibbs recovers from an injury caused by a bomb explosion, he experiences temporary memory loss, while his team tries to stop a terrorist group from carrying out a devastating attack on the Navy.

The NCIS is distressed when Gibbs is injured in a terrorist explosion while on assignment in part one of a two part third season finale.

Ziva becomes the focus of an NCIS investigation when a suspect in her custody dies.

Gibbs and the team go into protective overdrive when Abby becomes the prey of a stalker.

Gibbs and the team are called in when a Pentagon cryptographer suspected of spying apparently commits suicide.

Gibbs and the team are called in when a couple of kids stumble upon the body of a missing Marine in a frozen lake.

Gibbs and the team are called in when a teenage student at a Quantico base high school attaches a bomb to his body and holds his fellow students hostage.

Gibbs and the team are called to investigate when a group of teens on a nature hike discover Marine dog tags in a national forest.

The team investigates the mysterious explosion of an ambulance that is supposedly carrying the remains of a Marine killed in a car crash.

Gibbs and the NCIS team make a disturbing discovery when they bust an illegal automotive chop shop run by Marines.

When the wives of two Marines are murdered, Gibbs and the team are called in to investigate.

Gibbs and the team are called in on a weekend when a Navy Lt. Commander in charge of a shipment of nuclear weapons is apparently abducted.

Gibbs and the team rush to find Tony and Ziva who disappear while investigating a shipyard for smuggled weapons.

Gibbs and the team investigate the murder of a supermodel filming a reality TV show on a Marine base.

When McGee kills a man while on assignment, the NCIS team steps in to back him when they discover the man was an undercover police officer.

The NCIS team rallies to clear his name when Tony is accused of murder.

When the bodies of two assassins are delivered to NCIS from overseas, Tony and Ziva assume their identities undercover and engage in a sexy rendezvous at a luxury hotel in order to find their target.

Gibbs and the team investigate when a 6-year-old boy informs NCIS his father has been kidnapped.

Gibbs and the team investigate the murder of Marine's wife that appears to have been broadcast over the Internet.

The NCIS team is called in when a Petty Officer is brutally gunned down on the freeway.

Gibbs and the team are called in when a recently deceased man is found encased in a Civil War-era tomb.

Gibbs is ordered to meet with a convicted serial killer three days away from his execution in order to find out crucial information before he dies.

Ari continues to wreak havoc on the NCIS team as he uses its members as pawns in the game he is playing with Gibbs.

While the NCIS team deals with Kate's death, Gibbs' determination to finally put an end to Ari's reign of terror mounts.

Gibbs' worst fears are confirmed when he learns that his nemesis, Arab/Israeli double agent Ari (Rudolf Martin), is back in Washington D.C. on assignment to kill him. Ultimately, the NCIS team discovers that Ari has a bigger plot... and they end up paying the ultimate price trying to thwart it--the death of a team member.

When a letter sealed with a kiss is delivered to NCIS, Tony assumes it's for him and opens it, only to release a mysterious powder into the NCIS squad room.

Gibbs and the team work to clear the name of a Navy medic killed in Iraq, who is the prime suspect in a murder in his hometown.

Gibbs and the team head back to school when a Marine in an ROTC program is found murdered on a college campus.

The NCIS team investigates when a Petty Officer commits suicide after being institutionalized for a nervous breakdown.

The NCIS team investigates when a petty officer who recently returned from duty is found dead backstage at a local bikini contest.

The NCIS team investigates when a pair of blue eyeballs are sent to a sailor in D.C. in a package from Paraguay.

The NCIS team investigates the bizarre death of a female petty officer who is found brutally murdered in the bed of a dance club bartender.

The NCIS team investigates when a Marine records his own murder on video as he falls off a cliff.

Gibbs gives McGee a shot at running a case when the NCIS team is called to investigate when a woman claims to have witnessed the murder of a sailor.

As he reassembles the pieces of three bodies found stuffed in barrels months ago, Ducky is shocked when he discovers their identities.

The NCIS team investigates the possible murder of a petty officer that was reported by a telemarketer who heard it over the phone.

The NCIS team investigates when the body of a naval officer missing for 2 years turns up on the bottom of a lake.

The team must work together to find Tony when he disappears during an undercover operation.

Gibbs and his team are called to the scene when a Marine's wife kills an intruder who tried to rape her.

Gibbs and his team are summoned to examine the mysterious death of a Navy commander who, after successful open heart surgery, seemingly bursts into flames.

Gibbs and his team must clear the name of an elderly Marine who confesses to murdering his best friend nearly 60 years ago.

The NCIS team protects an Iraqi War veteran who is the target of terrorist threats.

Body found on a Marine firing range leads the team to discover a Mafia dumping ground.

The NCIS team is called in to investigate when a body dressed as a Navy lieutenant is discovered apparently raped and murdered.

The NCIS team is called in to investigate when a perfectly functioning Marine helicopter is found in the middle of a crop circle.

The NCIS team is called in to investigate when the decomposed body of a woman in a wedding dress is found in a cell beneath abandoned military housing.

When the wife and 9-year-old blind daughter of a Navy captain are kidnapped, Gibbs and his team are faced with a unique challenge.

Gibbs' obsession with finding the terrorist Ari (Rudolf Martin) reaches its zenith, and is timed perfectly, as Ari is training men for an attack on Marine One with President Bush and Prime Minister Sharon on board.

Gibbs' team investigates the death of a SEAL during a training exercise, and come to suspect that it wasn't an accident, but a murder.

When a Marine is killed with a specialized military weapon, the agents investigate the illegal weapons market and find an undercover ATF agent (Bellamy Young) also working on the case, and Gibbs asks her to work with them to find the killer.

The NCIS agents search for a missing marine, who unbeknownst to them, is being tortured in a cell by a mysterious captor.

The team investigates the murder of one of their own, an NCIS agent who was working on a cold case when he was shot and nearly disemboweled.

Gibbs and his team search for a former Navy SEAL who escaped from Leavenworth, where he was serving time for killing his wife and her lover.

Gibbs is frustrated by the mystery surrounding the discovery of a dead petty officer who was dressed after he died and stuffed in the ceiling of a nightclub.

Ducky and Gerald are held hostage in the autopsy room of NCIS headquarters by an armed intruder (Rudolf Martin), whose purpose is unexplained.

The FBI asks Gibbs to find his former Marine C.O., who they've accused of stealing money from a mission in Iraq. But Gibbs is convinced that the man who trained him is innocent.

The team investigates the murder of a Naval officer who was shot as he tried to help a stranded motorist.

The team investigates the murder of a Marine recruitment officer, who was killed, as the team discovers, by a highly skilled sniper.

The discovery of a leg with a Marine tattoo on the calf leads the team to a small town where they uncover a murder scheme involving deception and greed.

A Naval officer hired by an outside agency to test a product for possible Navy use is murdered, and Gibbs finds that the case is cloaked in secrets and deceptions.

A woman (Sherilyn Fenn) digs herself out of a shallow grave and doesn't know who she is, but is convinced that a bomb is on board a Navy ship.

Gibbs and his team investigate when a dead Marine's wife receives a call from someone claiming to be her husband.

A Navy translator dies mysteriously soon after returning to the U.S. from Guantanamo Bay, and the investigation takes the team to Cuba.

The discovery of the body of a Navy submariner whose features are all but obliterated leads Gibbs to believe a terrorist has stolen the man's identity and is aboard a sub.

An NCIS agent (Joel Gretsch) who worked for Gibbs asks his help in the case of a seaman (Charlie Hofheimer) who tests positive for methamphetamines, but claims he never took the drug.

A hunter discovers a cargo pod stuffed with the mummified body of a Naval officer who vanished in 1994 and was believed to have stolen money from his ship.

A Navy seaman is found at the bottom of the ocean in his dress whites with a ceremonial sword around his waist, attached to weights.

When the bodies of a Navy commander and two drug dealers wash up on the beach near each other, everyone, except Gibbs, believes the commander was involved in a drug deal.

A Marine dies when his parachute fails and he crashes through a car during a training exercise, and Gibbs suspects he was murdered.

A Marine mysteriously drops dead aboard Air Force One and jurisdiction problems force Gibbs to share the investigation with a Secret Service agent.