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John Mills as Phillip Davidson |
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John McCallum as Supt. Bob Lowther |
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Elizabeth Sellars as Fay Lowther |
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Eva Bergh as Ilse |
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Geoffrey Keen as Craig |
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Michael Martin Harvey as Jackson |
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John Chandos as Boyd |
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John Slater as Pewsey |
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Thora Hird as Mrs Pewsey |
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Vida Hope as Alice Gedge |
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John Glyn-Jones as Gedge |
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Mary Mackenzie as Gladys |
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Harold Lang as Boyd's Chauffeur/Receptionist |
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John Horsley as Bletchley |
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Fred Johnson as Driver |
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Laurence Naismith as Hasbury |
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Peter Jones as Fisher |
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Christopher Beeny as Mickie |
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Denis Shaw as Shaw (uncredited) |
| Directing | Robert Hamer | Director |
| Camera | Harry Waxman | Director of Photography |
| Writing | Howard Clewes | Novel |
| Writing | Robert Hamer | Screenplay |
| Writing | Frank Harvey | Screenplay |
| Production | Hugh Stewart | Producer |
| Sound | William Alwyn | Original Music Composer |
| Editing | Gordon Hales | Editor |
| Production | Earl St. John | Executive Producer |
| Production | Weston Drury Jr. | Casting Director |
| Art | Alex Vetchinsky | Art Direction |
| Costume & Make-Up | Joan Ellacott | Costume Design |
| Costume & Make-Up | George Blackler | Makeup Designer |
| Production | Bill Kirby | Location Manager |