Yannick Bisson Detective William Murdoch Actor Helene Joy Dr. Julia Ogden Actor Samantha Adams Norma Actor Jonny Harris Constable George Crabtree Actor Thomas Craig Inspector Thomas Brackenreid Actor Lachlan Murdoch Henry Higgins Actor Mark Caven Chadwick Vaughan Actor Daniel Maslany Detective Llewellyn Watts Actor Shanice Banton Violet Hart Actor Clare McConnell Effie Newsome, Effie Crabtree Actor Bea Santos Louise Cherry Actor Benjamin Blais Guy Pascoe Actor Sally Lindsay Nigella Fletcher Actor Cyrus Lane Rupert Newsome Actor Ali Badshah Mr. Lemiuex Actor Paulino Nunes Frank Bale Actor Paul Sun-hyung Lee Inspector Albert Choi Actor Kris Siddiqi Parker Crosby Actor Brian Bisson Mr. Mark Gilbert Actor Kyle Gatehouse Bucky Featherstonhaugh Actor Maureen Jennings Writer Giacomo Gianniotti Director Jenny Lee Writer Keri Ferencz Writer, Co-Executive Producer, Producer Cal Coons Writer Vanessa Matsui Director Peter Mitchell Writer Craig Wallace Director Alexandra Zarowny Writer Nick West Writer R.B. Carney Writer