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George C. Scott as Dan Charles Logan |
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Richard Basehart as Dr. Roy Caldwell |
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Martin Sheen as Maj. Holliford |
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Barnard Hughes as Dr. Spencer |
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Nicolas Beauvy as Chris Logan |
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Paul Stevens as Col. William Franklin |
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Stephen Young as Major Reintz |
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Kenneth Tobey as Col. Alan A. Nickerson |
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Robert Walden as Dr. Janeway |
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William Jordan as Major Cooper |
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Dabbs Greer as Dr. Thompson |
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John Dierkes as Bill Parker |
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Bette Henritze as Sarah Parker |
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Lou Frizzell as Dr. Spike Boynton |
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Ed Lauter as Simpson |
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Phoebe Noel as Waitress |
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Steve DeFrance as Ambulance Driver (uncredited) |
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Anna Aries as Bit Part |
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Fielding Greaves as Dr. Walter Steenrod, Chivington Research Laboratories |
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Terry Wilson as Kaufman Trucking Co. driver |
| Directing | George C. Scott | Director |
| Writing | Philip Friedman | Writer |
| Directing | William Lasky | Second Assistant Director |
| Sound | Lalo Schifrin | Original Music Composer |
| Camera | Fred J. Koenekamp | Director of Photography |
| Writing | Dan Kleinman | Writer |
| Production | Fred Weintraub | Producer |
| Editing | Michael Kahn | Editor |
| Production | Steven R. Stevens | Casting |
| Art | Frank Paul Sylos | Art Direction |
| Art | Leonard A. Mazzola | Set Decoration |
| Production | Leon Fromkess | Executive Producer |
| Production | J. Ronald Getty | Executive Producer |
| Production | Dan Kleinman | Associate Producer |
| Costume & Make-Up | Donald D. Dawson | Costume Design |
| Costume & Make-Up | Del Acevedo | Makeup Artist |
| Production | Francisco Day | Production Manager |
| Directing | Joseph E. Rickards | Second Assistant Director |
| Directing | Peter R. Scoppa | Assistant Director |
| Art | Dennis J. Parrish | Property Master |
| Sound | Bob Biggart | Sound Editor |
| Sound | Dennis Maitland | Sound Mixer |
| Sound | Francis J. Scheid | Sound |
| Sound | Pat Somerset | Sound Editor |
| Sound | Dick Weaver | Sound |
| Crew | Joe Lombardi | Special Effects |
| Crew | Paul J. Lombardi | Special Effects |
| Crew | Bill Hickman | Stunt Coordinator |
| Crew | Jerry Brutsche | Stunts |
| Camera | Chuck Arnold | Camera Operator |
| Production | Frank Kennedy | Extras Casting |
| Production | Jack N. Young | Location Manager |
| Sound | Eugene Marks | Music Editor |
| Sound | Dale Anderson | Musician |
| Sound | Israel Baker | Musician |
| Sound | Hoyt Bohannon | Musician |
| Sound | Herman Clebanoff | Musician |
| Sound | Vince De Rosa | Musician |
| Sound | Bonnie Jean Douglas | Musician |
| Sound | John Ellis | Musician |
| Sound | Dominick Fera | Musician |
| Sound | Clare Fischer | Musician |
| Sound | Ralph Grierson | Musician |
| Sound | Anatol Kaminsky | Musician |
| Sound | Artie Kane | Musician |
| Sound | Nathan Kaproff | Musician |
| Sound | Myra Kestenbaum | Musician |
| Sound | Raphael Kramer | Musician |
| Sound | Bernard Kundell | Musician |
| Sound | Michael Lang | Musician |
| Sound | Ronald Langinger | Musician |
| Sound | Joe Livoti | Musician |
| Sound | Abe Luboff | Musician |
| Sound | Alfred Lustgarten | Musician |
| Sound | Edgar Lustgarten | Musician |
| Sound | Virginia Majewski | Musician |
| Sound | Richard Nash | Musician |
| Sound | John Neufeld | Musician |
| Sound | Dick Noel | Musician |
| Sound | Joe Porcaro | Musician |
| Sound | Joseph Reilich | Musician |
| Sound | Dorothy Remsen | Musician |
| Sound | Lalo Schifrin | Orchestrator |
| Sound | Frederick Seykora | Musician |
| Sound | Eleanor Slatkin | Musician |
| Sound | Sheridon Stokes | Musician |
| Sound | Tommy Tedesco | Musician |
| Sound | Milton Thomas | Musician |
| Sound | Dan Wallin | Scoring Mixer |
