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Hugh O'Brian as Hugh Lockwood |
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Elke Sommer as Heideline 'Uli' Ullman |
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Burgess Meredith as V.C.R. Cameron |
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Lilia Skala as Frieda Ullman |
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Angel Tompkins as Gloria Harding |
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John Gielgud as Harold L. Streeter |
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Kent Smith as Dr. Edward Laurent |
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Alfred Ryder as Cheyne |
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Ben Wright as Kurt van Niestat |
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Robert Boon as Felix Ernst |
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Albert Popwell as Dr. Griffin |
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A Martinez as Carlos Lobos |
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Byron Chung as Kuroda |
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Ginny Golden as Miss Keach |
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Jules Maitland as Reinhardt Brugge |
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David Ahdar as Hotel Clerk (uncredited) |
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Robert Cole as Waiter (uncredited) |
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John Daheim as Guard (uncredited) |
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Jan Daley as Lockwood's Girl (uncredited) |
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Joanna Frank as Stewardess (uncredited) |
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Dale Johnson as Waiter (uncredited) |
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Joe Pine as Hotel Guest (uncredited) |
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Murray Pollack as Hotel Guest (uncredited) |
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Ford Rainey as Aaron Johannes (uncredited) |
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Tony Regan as Waiter (uncredited) |
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Jeffrey Sayre as Hotel Guest (uncredited) |
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Jaclyn Smith as Stewardess (uncredited) |
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Judith Woodbury as Hotel Guest (uncredited) |
| Directing | Russ Mayberry | Director |
| Writing | Leslie Stevens | Teleplay |
| Production | Leslie Stevens | Producer |
| Sound | Dominic Frontiere | Music |
| Camera | John M. Stephens | Director of Photography |
| Editing | Bill Brame | Editor |
| Art | Fred Harpman | Art Direction |
| Art | James W. Payne | Set Decoration |
| Costume & Make-Up | Gordon Bau | Makeup Supervisor |
| Costume & Make-Up | Joan Phillips | Hairstylist |
| Sound | Everett A. Hughes | Sound |
| Costume & Make-Up | Ruth Hancock | Wardrobe Coordinator |