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Don Murray as Dr. Alex Lauder |
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Ray Milland as Prof. Samuel Hale Constable |
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Gene Tierney as Lenore Constable |
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Barbara Dana as Tina Cryder |
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Ed Asner as Saul Wiener |
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Pamelyn Ferdin as Mary Constable |
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William Beckley as Arnold Watson Bessmer |
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Ivor Barry as Dr. Paul Cryder |
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George Macready as Dr. Frank Ferguson |
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John Carradine as Mr. Bosch |
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Virginia Christine as Helga |
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Cecile Ozorio as Devi Bessmer |
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Frank Maxwell as General Augstadt |
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Hal Frederick as C.I.C. Technician |
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Bill Hickman as Enemy Agent |
| Directing | Walter Grauman | Director |
| Sound | Robert Drasnin | Original Music Composer |
| Writing | Luther Davis | Teleplay |
| Editing | Michael Economou | Editor |
| Production | Walter Grauman | Producer |
| Production | William Kayden | Associate Producer |
| Sound | Lionel Newman | Music Supervisor |
| Writing | Paul Gallico | Novel |
| Crew | L.B. Abbott | Special Effects |
| Production | Jack Sonntag | Production Supervisor |
| Crew | Art Cruickshank | Special Effects |
| Production | Harry Templeton | Unit Production Manager |
| Writing | Arthur Semon | Executive Story Editor |
| Crew | Jack Woolf | Cinematography |
| Art | Sven Wickman | Set Decoration |
| Art | Philip Barber | Art Direction |
| Art | Jack Martin Smith | Art Direction |
| Directing | Larry Powell | Assistant Director |
| Production | Charles B. Fitzsimons | Supervising Producer |
| Crew | Samuel E. Beetley | Post Production Supervisor |
| Art | Walter M. Scott | Set Decoration |
