Production is underway on Global’s anticipated new drama “Mary Kills People”, starring Caroline Dhavernas (“Hannibal”, “Wonderfalls”) as ER doctor Mary Harris, a single mom who moonlights as an underground angel of death, assisting terminally ill patients engineer their own deaths so they can go out on their own terms.

When Mary’s precarious double life begins to unravel, Mary realizes she’s going to have to fight dirty in order to continue her self-appointed mission to help patients end their own misery — but at what cost?

The six-episode series will be shot in and around Toronto, with Global announcing additional cast. Starring alongside Dhavernas will be Jay Ryan (“Beauty and the Beast”) as Joel, one of Mary’s terminally ill clients, but a mutual attraction blurs the lines of their doctor-patient relationship, and Richard Short (“Vinyl”) as Des, Mary’s trusted partner in crime.

Related: ‘Mary Kills People’: Provocative Medical Drama Gets Greenlit

Rounding out the cast: Lyriq Bent (“Book of Negroes”) as Frank, Joel’s friend who worries he’s getting in too deep with “Dr. Death”; Greg Bryk (“Bitten”) as Grady, Mary’s drug supplier; Abigail Winters (“Between”) as Mary’s teen daughter, who learns that the people closest to her are not what they seem; and Charlotte Sullivan (“Rookie Blue”) as Nicole, Mary’s concerned sister.

“We are thrilled to bring together the best and the brightest in Canadian television for this timely and important new series,” said Maria Hale, Senior Vice President, Global Entertainment and Acquisitions, Corus. “’Mary Kills People’ ushers in a dynamic new type of storytelling for Global and we look forward to working with the terrific team at Entertainment One, along with [series creator] Tara Armstrong, [executive producer] Tassie Cameron, [director] Holly Dale and the talented cast to bring these rich characters and their stories to Canadian viewers.”

“Mary Kills People” is slated to debut on Global in early 2017.