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Oskar Homolka as Inspector Hanaud |
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Robert Urquhart as Jim Frobisher |
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Yvonne Furneaux as Betty Harlowe |
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Josephine Griffin as Ann Upcott |
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Harold Kasket as Boris Wabersky |
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Ruth Lodge as Nurse |
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Pierre Lefevre as Detective Maurice Thevenet |
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Pierre Chaminade as Detective Moreau |
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Jacques Cey as Police Commissaire Giradot |
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Anthony Nicholls as Lawyer Jarrett |
| Directing | Michael Anderson | Director |
| Writing | A.E.W. Mason | Novel |
| Writing | Edward Dryhurst | Writer |
| Production | Vaughan N. Dean | Producer |
| Sound | Gerald Crossman | Music |
| Camera | Erwin Hillier | Director of Photography |
| Editing | Edward B. Jarvis | Editor |
| Production | Robert Lennard | Casting |
| Art | Terence Verity | Production Design |
| Directing | Thelma Orr | Script Supervisor |
| Costume & Make-Up | Polly Young | Hairstylist |
| Costume & Make-Up | Eric Aylott | Makeup Artist |
| Sound | Les Hammond | Sound Recordist |
