cast
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Bernard Lee
Det. Supt. Meredith
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Alexander Knox
Colonel Calderwood
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Moira Redmond
Diana Marsh
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William Russell
Mike Stafford
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Richard Vernon
John Crewe
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Richard Warner
Mark Speller
- John Gabriel Monet
- Jack Rodney Gregory
- Stanley Morgan Det. Sgt. Anson
- Robert Percival Mr. Britton
- Ann Harriman Receptionist
- Julie Shearing Judy
- Fanny Carby Mrs. Wall
- Ian Hamilton Waiter
- Walter Horsbrugh Registrar