Yannick Bisson Detective William Murdoch Actor, Executive Producer Helene Joy Dr. Julia Ogden Actor Jonny Harris Constable George Crabtree Actor Thomas Craig Inspector Thomas Brackenreid Actor Lachlan Murdoch Henry Higgins Actor Daniel Maslany Detective Llewellyn Watts Actor Arwen Humphreys Margaret Brackenreid Actor Paul Sun-hyung Lee Inspector Albert Choi Actor Hanneke Talbot Kristy Actor Mac Fyfe Frank Ryan Actor Clare McConnell Effie Newsome Actor Mark Taylor Isaiah Buchanan Actor Brandon McGibbon Charles Chalk Actor Dan Beirne Shane McCowan Actor Michael Hough McBride Actor Thomas Mitchell Barnet Jimmy Murphy Actor Travis Nelson Joseph Greyson Actor Merle Newell Amanda Actor Felipe Aukai Dan Murphy Actor Maria Syrgiannis Camilla Actor Maureen Jennings Writer Simon McNabb Writer Cal Coons Writer Jayson Clute Director Alexandra Zarowny Writer Claire Hookway Executive Producer R.B. Carney Writer Sherren Lee Director Julie Lacey Writer Elsbeth McCall Director Peter Mitchell Writer