Mary Kills People

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.

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.

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

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 seriously considers giving up her operations for good.

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

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.

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

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

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.

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

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

Mary secretly takes in patients, but one death doesn't go as planned.

Mary promises Des that she'll never put the hospice at risk again; Mary and Frances meet an elderly cancer patient; Jess realizes that something's wrong with Naomi.

Mary makes a horrifying discovery, sending Annie on a dangerous collision course with Frances. Meanwhile, Ben attempts to reconcile with Mary, and Des becomes attached to a difficult patient.

Mary and her daughters are busy preparing for the arrival of her baby – a warm, new beginning in contrast to the harsh winter snow and ice that has encased Port Denver.

The plan to have Frances work in co-operation with the hospice's "dealings" is a risky endeavor, and one they will all regret to make. She isn't one to be trifled with, cunning and forever one step ahead.

Following a death at the hospice, Mary and Ben have 24 hours to convince the police that Frances is the real killer.