In the late 19th century, Toronto city police Detective William Murdoch takes a new, more scientific approach to murder investigation.

Detective Murdoch continues his inventive detective work with Ogden's unflinching support even after an investigation leads him to a family member that he never knew about.

Detective Murdoch seeks to find and protect his newly discovered son from the Black Hand gang. Meanwhile, Brackenreid's son has sprung loose from jail and is on the run, and Crabtree finds himself in a compromised situation as he tries to save Effie from her kidnappers.

A keen-minded detective uses revolutionary forensic techniques to solve the city's most mystifying crimes.

Dashing detective William Murdoch must solve a holiday whodunit in this feature-length special of the award-winning mystery series set in Edwardian Toronto. Days before Christmas, Murdoch and his wife, Dr. Julia Ogden, travel to Victoria, British Columbia, to spend time with Murdoch's eccentric brother. But instead of a relaxing holiday with Jasper and his family, they end up investigating a murder at an archaeological site.

Detective Murdoch and his team continue to tackle Edwardian Toronto's toughest mysteries, from the serious and historic to the comic and unusual.

Set in 1920s Toronto, the series follows the city's only female private detectives as they take on cases the police don't want to touch. In a time of change and hopefulness, their gender is their biggest advantage as they defy expectations and rebel against convention, taking on cases that explore every cross-section of Toronto, from gospel church choirs, bathing beauties and the early cinema scene, to the homes and private parties of the city's elite....