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Patrick O'Neal as Richard Cutting |
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Joan Hackett as Dominique Laurant |
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John Gielgud as Curt Valayan |
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Herbert Lom as Matt Wilson |
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Eric Portman as Notary |
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Peter van Eyck as Walter Green |
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Oskar Homolka as Inspector Ruff |
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Leon Greene as The Big Man |
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Kent Smith as Mr. Eversley |
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Philip Ober as Bohlen |
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Fifi D'Orsay as Mrs. Hennie |
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Éva Szörényi as Landlady (as Eva Soreny) |
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Cynthia O'Neal as Felice Valayan (as Cynthia Baxter) |
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Martin Miller as Police Chief (uncredited) |
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Charles H. Radilak as Manager (uncredited) |
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Erik Sorenson as Bellboy (uncredited) |
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Betty Bresler as Secretary (uncredited) |
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Joanne Ludden as Receptionist (uncredited) |
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Walter Friedel as Secretary (uncredited) |
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Karl Bruck as Waiter (uncredited) |
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Walter Janovitz as Waiter (uncredited) |
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Albert D'Arno as Waiter (uncredited) |
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Ann Prentiss as Hotel Party Girl in Red Dress (uncredited) |
| Editing | George R. Rohrs | Editor |
| Costume & Make-Up | Gordon Bau | Makeup Supervisor |
| Production | Jimmy Lydon | Producer |
| Art | John Beckman | Art Direction |
| Production | William Conrad | Executive Producer |
| Art | George James Hopkins | Set Decoration |
| Sound | Stanley Jones | Sound |
| Crew | Harold Lipstein | Cinematography |
| Production | Charles Bonniwell | Unit Manager |
| Directing | Gil Kissel | Assistant Director |
| Crew | Richard Farnsworth | Stunts |
| Directing | Doris DeHerdt | Script Supervisor |
| Costume & Make-Up | Jean Burt Reilly | Hair Supervisor |
| Crew | Fred Carson | Stunts |
| Directing | Sheldon Reynolds | Director |
| Writing | Sheldon Reynolds | Writer |
| Camera | Enzo Barboni | Director of Photography |
