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Richard Conte as Bill Locklin |
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Rona Anderson as Julia Jackson |
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Russell Napier as Supt. John Harrington |
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Sylva Langová as Hilde Heller, chief spy |
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Colin Gordon as Harry Martin - reporter |
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Donald Bisset as Editor Harris |
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John King-Kelly as Spy Henchman |
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Bernard Rebel as Vinson - Spy Henchman |
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Arnold Marlé as Prof. Leon Dushenko |
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John Horsley as Det. Sgt. Gibson |
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Jane Welsh as Supt. McCollum - sanitarium |
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Aimée Delamain as Mrs. Henley |
| Writing | Ken Hughes | Screenplay |
| Directing | Ken Hughes | Director |
| Writing | James Eastwood | Screenplay |
| Editing | Geoffrey Muller | Editor |
| Production | Jim O'Connolly | Production Manager |
| Writing | Eric Maschwitz | Story |
| Editing | Inman Hunter | Editor |
| Costume & Make-Up | Alice McLaren | Wardrobe Master |
| Directing | Fred Ruff | First Assistant Director |
| Directing | John Smith | Second Assistant Director |
| Camera | Josef Ambor | Director of Photography |
| Sound | Dick Smith | Sound Supervisor |
| Camera | Bob Penn | Still Photographer |
| Costume & Make-Up | Jack Craig | Makeup Artist |
| Sound | Sidney Rider | Sound Recordist |
| Sound | Dick Smith | Sound Recordist |
| Camera | Ron Robson | Camera Operator |
| Directing | Betty Parry | Continuity |
