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James Coburn as Dr. Sidney Schaefer |
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Godfrey Cambridge as Don Masters |
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Severn Darden as Kropotkin |
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Joan Delaney as Nan Butler |
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Pat Harrington Jr. as Arlington Hewes |
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Barry McGuire as Old Wrangler |
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Jill Banner as Snow White |
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Eduard Franz as Ethan Allen Cocket |
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Walter Burke as Henry Lux |
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Will Geer as Dr. Lee-Evan |
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William Daniels as Wynn Quantrill |
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Joan Darling as Jeff Quantrill |
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Sheldon Collins as Bing Quantrill |
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Arte Johnson as Sullivan |
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Martin Horsey as 1st Puddlian |
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William Beckley as 2nd Puddlian |
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Kathleen Hughes as White House Tourist |
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Walt Davis as Phoneman (uncredited) |
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John Gunn as FBR Agent (uncredited) |
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Pitt Herbert as White House Tour Guide (uncredited) |
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Soon-Tek Oh as Chinese Agent (uncredited) |
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Dyanne Thorne as Cocktail Waitress (uncredited) |
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Hank Worden as Dirty Old Man (uncredited) |
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Stephen Young as Man in Suit Killed in the Beginning (uncredited) |
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Patrick O'Moore as British Ambassador (uncredited) |
| Directing | Theodore J. Flicker | Director |
| Costume & Make-Up | Sugar Blymyer | Hairstylist |
| Production | William Davidson | Unit Production Manager |
| Costume & Make-Up | Nellie Manley | Hair Supervisor |
| Writing | Theodore J. Flicker | Writer |
| Costume & Make-Up | Emile LaVigne | Makeup Artist |
| Camera | David M. Walsh | Camera Operator |
| Sound | John Wilkinson | Sound Recordist |
| Sound | Robert Post | Sound Recordist |
| Crew | Fred Lerner | Stunts |
| Costume & Make-Up | Wally Westmore | Makeup Supervisor |
| Crew | Bill Saito | Stunts |
| Visual Effects | Albert Whitlock | Matte Painter |
| Directing | Kurt Neumann | Assistant Director |
| Sound | ლალო შიფრინი | Conductor |
| Lighting | Joe Smith | Gaffer |
| Crew | Larry Duran | Stunts |
| Crew | Kenny Endoso | Stunts |
| Sound | Emil Richards | Musician |
| Crew | Roger Creed | Stunts |
| Crew | Bill M. Ryusaki | Stunts |
| Sound | ლალო შიფრინი | Original Music Composer |
| Camera | William A. Fraker | Director of Photography |
| Art | Al Roelofs | Art Direction |
| Costume & Make-Up | Jack Bear | Costume Design |
| Art | Pato Guzman | Production Design |
| Production | Stanley Rubin | Producer |
| Editing | Stuart H. Pappé | Editor |
| Art | Arthur Krams | Set Decoration |
| Production | Howard W. Koch | Executive Producer |
| Art | Hal Pereira | Art Direction |
| Art | Robert R. Benton | Set Decoration |
