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Ivan Desny as Charles Valentine |
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Nadja Regin as Nadia Leiven |
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Michael Goodliffe as Det. Supt. Hallett |
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Brian Bedford as Jimmy Gale |
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Joyce Blair as Carol Clyde |
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Leonard Sachs as Weiland |
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Maxwell Shaw as Luigi Pirani |
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Harold Goodwin as Smith |
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John Welsh as Assistant Commissioner |
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Barrie Ingham as House Agent |
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Derrick Sherwin as Det. Sgt. Waters |
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Malou Pantera as Lotte |
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Andre Mikhelson as Head Waiter |
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Josephine Gordon as Mrs. Pirani |
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Norman Florence as Waiter |
| Directing | Robert Tronson | Director |
| Writing | Edgar Wallace | Original Story |
| Writing | Philip Mackie | Screenplay |
| Production | Jack Greenwood | Producer |
| Sound | Bernard Ebbinghouse | Original Music Composer |
| Camera | Bert Mason | Director of Photography |
| Editing | Derek Holding | Editor |
| Production | Ronnie Curtis | Casting Director |
| Art | Peter Mullins | Art Direction |
| Costume & Make-Up | Hilda Fox | Hairdresser |
| Costume & Make-Up | Michael Morris | Makeup Artist |
| Production | Harry Kratz | Production Manager |
| Directing | Gordon Gilbert | Assistant Director |
| Sound | Ronald Abbott | Sound Recordist |
| Sound | Brian Blamey | Sound Editor |
| Sound | Sidney Rider | Sound Recordist |
| Camera | Herbert Smith | Camera Operator |