Mary Kills People Canceled Global Series Not Returning for Season 4

Mary decides to wear a wire; Des and Nicole prepare for Brendan's death.

Ben forgives Mary; Mary and Des move forward with the death retreat.

Following the disappearance of Travis, Des worries that he and Mary may have crossed a moral line from which they can never return. After jeopardizing Ben's investigation of Olivia, Mary tries to make amends, which has repercussions for a patient in dire need.

Mary and Ben join forces; Travis reveals a crucial detail about Ben's investigation.

When Olivia attempts to blackmail Mary, she is drawn deeper into a deadly game of cat and mouse.

It's been eight months since Mary and Des framed Grady, their drug dealer, for the deaths of their patients. While Des has been serving prison time to protect his partner, Mary's been managing surprisingly well on her own – she's found a new supply of pentobarbital in Mexico, her business has continued to thrive thanks to Annie's ability to source terminal clients in need, and her ex-husband Kevin has moved in and taken on half the parenting duties following a messy break-up with Louise. Though Jess still suspects that her mother is hiding something, Mary has been working diligently to keep her professional and private lives separate. But secrets can only be hidden for so long when Olivia – a mysterious woman with a connection to Mary and Des – comes to them with a deadly request.

In order to save her family and career, Mary makes a difficult decision.

Mary seriously considers giving up her operations for good.

Ben follows Mary to her childhood home where he learns about her past; Grady approaches Mary with an offer; Des becomes a victim of police misconduct.

Mary confronts Ben; Grady blackmails Mary into helping him break a patient out of the hospital; Ben and Frank get a new lead.

After being intimate with Joel, Mary has second thoughts about ending his life; a client's son pulls a gun on Des; Kevin's relationship with a new woman gets intense.

Dr. Mary Harris has a secret – beneath the surface of being an ER doctor and loving mother, Mary is also Dr. Death, helping terminal patients end their lives. She and her partner Des have been operating covertly for almost six months but a series of unforeseen circumstances, beginning with the assisted death of superstar football player Troy Dixon goes wrong, conspire to tear Mary down. Meanwhile, her greedy ex-husband Kevin introduces her to his new girlfriend, she discovers that her 15-year-old daughter's wild BFF is into heavy drugs, and Mary ends up seducing a patient who is not who he seems.