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Gregory Ratoff as Alexei Leshki |
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Ronald Squire as Sir Charles Farringdon |
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Binnie Barnes as Valerie Petrovna |
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Tamara Desni as Marie-Louise |
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Barry MacKay as Michael Farringdon |
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Anthony Bushell as Rex Farringdon |
| Directing | Phil Rosen | Director |
| Production | Richard Wainwright | Producer |
| Writing | Dennis Wheatley | Novel |
| Writing | Alma Reville | Screenplay |
| Writing | Dorothy Farnum | Adaptation |
| Production | Joe Rock | Associate Producer |
| Sound | Louis Levy | Original Music Composer |
| Sound | Charles Williams | Original Music Composer |
| Editing | Hugh Stewart | Editor |
| Writing | Dorothy Farnum | Writer |
