Mary decides to wear a wire; Des and Nicole prepare for Brendan's death.
Mary Kills People Episode Guide
Ben forgives Mary; Mary and Des move forward with the death retreat.
Des worries that he and Mary may have crossed a moral line; Ben's investigation is jeopardized.
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.
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.
When Dr. Mary Harris becomes romantically involved with an attractive patient, it sets off a chain of events that could destroy her life, her family, and her career – not to mention her illegal side gig, helping terminal clients end their lives.