Mary Kills People

Mary flies under the radar while taking in patients, but one death doesn't quite go according to her plan.

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.

Following a disturbing revelation about Frances, Mary enacts a bold plan to remove her from the hospital; Mary and Ben try to reconcile their turbulent pasts in the face of news about their future.

Mary turns to Ben for help and agrees to stop killing people at the hospice; after watching one of her patients die an excruciating natural death, Mary recommits to her cause and hatches a plan to deal with Frances.

Mary and Ben take a calculated risk in trying to take Frances down.

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