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Rod Taylor as Peter McDermott |
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Catherine Spaak as Jeanne Rochefort |
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Karl Malden as Keycase Milne |
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Melvyn Douglas as Warren Trent |
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Merle Oberon as The Duchess Caroline |
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Richard Conte as Detective Dupere |
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Michael Rennie as Geoffrey - Duke of Lanbourne |
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Kevin McCarthy as Curtis O'Keefe |
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Carmen McRae as Christine |
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Alfred Ryder as Capt. Yolles |
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Roy Roberts as Bailey |
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Al Checco as Herbie Chandler |
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Sheila Bromley as Mrs. Grandin |
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Harry Hickox as Sam |
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William Lanteau as Mason |
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Ken Lynch as Joe Laswell |
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Clinton Sundberg as Lawrence Morgan |
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Tol Avery as Kilbrick |
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Davis Roberts as Dr. Elmo Adams |
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George Boyce as Bellhop |
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Charles Alvin Bell as Vickery |
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Robert Goodwin as Henry |
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Jack Donner as Elliott (uncredited) |
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Lester Dorr as Cy - Elevator Operator (uncredited) |
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Vince Howard as Tousaint (uncredited) |
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Dorothy Konrad as Housekeeper (uncredited) |
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Judy Norton as Daughter (uncredited) |
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John Sebastian as Giotti (uncredited) |
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William Swan as Young Desk Clerk (uncredited) |
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Arthur Tovey as Hotel Patron (uncredited) |
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Ivan Bonar as Silverstein (uncredited) |
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Wilma Francis as Woman at Airport |
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Dee Carroll as Mother (uncredited) |
| Costume & Make-Up | Gordon Bau | Makeup Supervisor |
| Costume & Make-Up | Jean Burt Reilly | Hair Supervisor |
| Production | Carter DeHaven Jr. | Unit Manager |
| Directing | Mickey McCardle | Assistant Director |
| Sound | M.A. Merrick | Sound Mixer |
| Camera | Richard Doran | Assistant Camera |
| Lighting | Michael A. Jones | Electrician |
| Directing | Richard Quine | Director |
| Writing | Arthur Hailey | Novel |
| Writing | Wendell Mayes | Adaptation |
| Production | Wendell Mayes | Producer |
| Sound | Johnny Keating | Original Music Composer |
| Camera | Charles Lang | Director of Photography |
| Editing | Sam O'Steen | Editor |
| Art | Cary Odell | Art Direction |
| Art | George James Hopkins | Set Decoration |
| Costume & Make-Up | Edith Head | Costume Design |
| Costume & Make-Up | Howard Shoup | Costume Design |
