Unnatural Causes
Roy Marsden returns as author P.D. James's indefatigable gumshoe, Inspector Adam Dalgliesh. This time, he's investigating the murder of a famous mystery writer whose body is found in the bottom of a dinghy on the Suffolk coast. To add a further degree of difficulty, Dalgliesh must contend with a colleague on the case, the aptly named Inspector Reckless.
Top cast
Roy MarsdenCommander Adam Dalgliesh
Simon ChandlerDigby Seton
Kenneth ColleyInspector Gerry Reckless
Mel MartinDeborah Riscoe
Bill NighyOliver Latham
James CossinsJustin Bryce
Nicholas JonesLuker
Anne LambtonSylvia Kedge- Marjie LawrenceCelia Calthorpe
Roger AlboroughSuperintendent Maitland
Lucy BriersLiz Marley- David ConvilleMax Gurney
Below are the streaming services currently carrying the movie “Unnatural Causes” in Canada, along with how each offers it (subscription, buy, or rent) and a direct link. Licensing differs by market, so availability in Canada can differ from other countries.
Where to watch Unnatural Causes in Canada
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Not currently available on the supported providers in Canada.
Availability can change as licenses rotate — confirm on the provider’s page before subscribing. Last checked: 13 Sept 2026.