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Eric Portman as Arthur Lawrence |
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Ann Dvorak as Joan Grahame |
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Karl Stepanek as Franz von Brinkman |
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Ronald Ward as Rupert Chessman |
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Ronald Adam as George Merrick |
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Felix Aylmer as Sir Alfred Horton |
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Brefni O'Rorke as Security Officer |
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A.E. Matthews as Sir Thomas Leighton |
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Ivor Barnard as Henry Waud |
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David Peel as Lt. Peter Leighton |
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Charles Victor as Petty Officer Flanagan |
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George Merritt as Works Manager |
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Marjorie Rhodes as Mrs. Pickles |
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John Ruddock as Jim |
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Frederick Cooper as Gösta |
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Lily Kann as Karin Möller |
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Richard George as Admiral of Operations |
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James Pirrie as Reporter |
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Doyley John as Lt. Commander |
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Norman Whitcomb as Brinkmann's Secretary |
| Sound | William Alwyn | Music |
| Writing | Jack Whittingham | Writer |
| Production | William Sistrom | Producer |
| Costume & Make-Up | Tony Sforzini | Makeup Artist |
| Directing | Lance Comfort | Director |
| Writing | Wolfgang Wilhelm | Writer |
| Camera | Guy Green | Director of Photography |
| Art | William C. Andrews | Art Direction |
| Editing | Edward B. Jarvis | Editor |
| Directing | Victor Hanbury | Director |
| Sound | John Dennis | Sound Recordist |
| Camera | Jack Hildyard | Camera Operator |
