Yannick Bisson leads as Detective William Murdoch alongside Helene Joy as Dr. Julia Ogden and Thomas Craig as Inspector Thomas Brackenreid in the long-running Canadian period detective drama Murdoch Mysteries.
Main cast
- Detective William MurdochYannick Bisson1–Main
- Dr. Julia OgdenHelene Joy1–Main
- Inspector Thomas BrackenreidThomas Craig1–Main
- Constable George CrabtreeJonny Harris1–Main
Supporting cast
- Constable Henry HigginsLachlan Murdoch1–Supp
- Margaret BrackenreidArwen Humphreys1–Supp
- Dr. Emily GraceGeorgina Reilly5–8Supp
- Rebecca JamesMouna Traoré10–Supp
- Terrence MeyersPeter Keleghan2–13Supp
Guest & voice
- Various (multiple guest roles)William Shatner11, 14Guest
- Dr. Darcy GarlandColin Mochrie11Guest
- Clara Brett MartinSarah Gadon2Guest
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About this cast
Murdoch Mysteries follows Detective William Murdoch of the Toronto Constabulary in the late 19th and early 20th centuries, using innovative forensic methods. The series stars Yannick Bisson as the titular detective, with Helene Joy as his love interest and colleague Dr. Julia Ogden, and Thomas Craig as his gruff superior Inspector Brackenreid. The show has been a staple of Canadian television…
FAQs
Who plays Detective William Murdoch in Murdoch Mysteries?
Detective William Murdoch is played by Canadian actor Yannick Bisson, who has portrayed the character since the series began in 2008.
How many seasons of Murdoch Mysteries are there?
As of 2025, Murdoch Mysteries has 18 seasons. The 18th season aired in late 2024/early 2025, and the series has been renewed for a 19th season.
Is Murdoch Mysteries based on books?
Yes, the series is loosely based on the ‘Detective Murdoch’ novels by Maureen Jennings, although the show expands on the characters and storylines significantly.
Where can I watch Murdoch Mysteries in the UK?
In the UK, Murdoch Mysteries has aired on Alibi and is available on streaming services like Amazon Prime Video (with a subscription) and sometimes on BBC iPlayer.
Sources & where to watch: IMDb · Wikipedia · Where to watch (JustWatch UK) · Updated June 2026