Directed by
| George McCowan | ... | (as Alan Smithee) |
| Alan Smithee | ... | (really George McCowan) |
Writing Credits
| Marc Norman | ... | (written by) |
Cast (in credits order) complete, awaiting verification
| Darren McGavin | ... | Jacob Gallery | |
| Broderick Crawford | ... | Gen. Lewis Meyers | |
| James Whitmore | ... | Overman | |
| Skip Homeier | ... | Lyman George | |
| Paul Lukas | ... | Dr. Nagy | |
| Sam Elliott | ... | Bryant | |
| Mako | ... | Yuro | |
| Adolph Caesar | ... | Clarence Opano | |
 |
Andre Philippe | ... | Swiss Official |
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Arianne Ulmer | ... | Sarah |
| Davis Roberts | ... | Scientist | |
| Byron Morrow | ... | Defense Secretary | |
| Bill Zuckert | ... | Army Colonel | |
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Joseph Bernard | ... | Doctor |
| Gene LeBell | ... | Karate Instructor | |
| Lew Brown | ... | Sergeant | |
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Eddie Guardino | ... | Soldier |
| Garry Walberg | ... | Submarine Captain | |
| Bill Quinn | ... | Marine Colonel | |
| Michael Hinn | ... | Army Captain | |
Produced by
| Jay Cipes | ... | producer |
| Ed Palmer | ... | producer |
Music by
| Harry Geller | ... | (music) |
Cinematography by
| John M. Nickolaus Jr. | ... | (as John Nickolaus) |
Editing by
| Joseph Gluck | ... | film editor (as Joe Gluck) |
| Stanford Tischler | ... | film editor |
Art Direction by
| Ed Graves | ||
| Jack Martin Smith | ||
Set Decoration by
| Bert Allen | ||
| Walter M. Scott | ||
Production Management
| Samuel E. Beetley | ... | post-production supervisor |
| Mike Salamunovich | ... | unit production manager |
| Jack Sonntag | ... | production supervisor |
Second Unit Director or Assistant Director
| Joseph E. Rickards | ... | assistant director (as Joe Rickards) |
Visual Effects by
| L.B. Abbott | ... | special optical effects |
Music Department
| Lionel Newman | ... | musical supervision |
Additional Crew
| Arthur Semon | ... | executive story editor |
| Charles B. Fitzsimons | ... | supervising production executive (uncredited) |
