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Peter Graves as James Phelps |
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Martin Landau as Rollin Hand |
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Barbara Bain as Cinnamon Carter |
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Greg Morris as Barney Collier |
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Peter Lupus as Willy Armitage |
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David Sheiner as Colonel Ziegler |
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Lee Meriwether as Anna Rojak |
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Milton Selzer as Dr. Erich Rojak |
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George Fisher as Major Strat |
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Jack Donner as Captain Praedo |
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George Sperdakos as Dr. Dromm |
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Ray Baxter as Alexander Ventlos |
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Paul Lukather as Lieutenant |
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Martin Kosleck as General |
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Jack Denbo as Reporter #1 |
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Walter Alzmann as Elevator Guard |
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Bruce Mars as Sergeant |
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Gene Benton as Dr. Taber |
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Albert Cavens as Guard (uncredited) |
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George Hickman as Janitor (uncredited) |
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Bob Johnson as Person on Tape (voice) (uncredited) |
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Bert Kramer as Routine Guard (uncredited) |
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Joe Ploski as Reporter (uncredited) |
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Leoda Richards as Reporter (uncredited) |
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Norman Stevans as Official (uncredited) |
| Directing | John Llewellyn Moxey | Director |
| Writing | Paul Playdon | Writer |
| Camera | Keith C. Smith | Director of Photography |
| Editing | David Wages | Editor |
| Production | Stanley Kallis | Producer |
| Production | Bruce Geller | Executive Producer |
| Production | Barry Crane | Associate Producer |
| Art | Lucien Hafley | Set Decoration |
| Art | Bill Ross | Art Direction |
| Costume & Make-Up | Robert Dawn | Makeup Artist |