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Alastair Sim as Samuel Blight |
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Barry K. Barnes as Larry Preston |
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Diana Churchill as Janet Preston |
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Edward Chapman as Detective Inspector Bray |
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Ruby Miller as Mrs. Honeycombe |
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Austin Trevor as Heinreks |
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Leo Genn as Another Agent |
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Geoffrey Sumner as Detective Delacroix |
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Glen Alyn as Agent Posing as Reporter |
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Torin Thatcher as Karl Bergsen |
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Carl Jaffe as Foreign Agent |
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Cathleen Nesbitt as Miss. Sampson |
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Cyril Smith as Barber |
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James Harcourt as Judge |
| Writing | Roger MacDougall | Screenplay |
| Directing | David MacDonald | Director |
| Production | K.C. Alexander | Producer |
| Sound | Francis Chagrin | Music |
| Camera | Ernest Palmer | Director of Photography |
| Editing | Douglas Myers | Editor |
| Art | James A. Carter | Art Direction |
| Production | Louis London | Production Manager |
| Directing | George Pollock | Assistant Director |
| Sound | Leo Wilkins | Sound Recordist |
| Camera | Cecil Cooney | Camera Operator |
