Orson Welles’ Great Mysteries is a British television anthology series produced by Anglia Television for the ITV network and broadcast between 1973 and 1974. The series presents standalone adaptations of classic mystery, crime, and supernatural stories drawn from literary sources including Dickens, Conan Doyle, Wilkie Collins, Balzac, Maugham, O. Henry, and others. Each episode is framed by original introductory and closing sequences performed by Orson Welles, who serves as the series’ host and sole recurring on-screen presence. These segments, written and directed by Welles (uncredited), function as stylized narrative framing devices rather than dramatic participation in the stories themselves. The dramatic content of each episode is performed by separate casts and directors, with no continuing characters or serialized narrative, establishing the series as a unified television anthology rather than a collection of standalone films.

Orson Welles
Self - Host

Joan Collins
Jane Blake

Ian Bannen
Gregory Dean
Daphne Heard
Deborah Crabbe

Milo O'Shea
Father Crumlish

Patrick Magee
Sergeant Morris

Glyn Owen
Det. Inspector Cumberland

Rupert Davies
Lemerie

Susannah York
Countess Josephine
Barnaby Jones70%
Alfred Hitchcock Presents77%
Baretta65%
Agatha Christie's Poirot81%
Annika69%
Agatha Christie's Marple78%
The Hardy Boys72%
Frankie Drake Mysteries63%
What Remains73%
Mosaic65%
Murdoch Mysteries77%
Steal74%
Perry Mason77%
Twisted73%
Inspector George Gently79%
The New Alfred Hitchcock Presents72%
Ironside68%
High Potential81%
Dalziel and Pascoe64%
Homicide: Life on the Street81%