 | Jim Davis als Dr. Quent Brady |
 | Robert Griffin als Dan Morgan |
 | Joel Fluellen als Arobi |
 | Barbara Turner als Lorna Lorentz |
 | Eduardo Ciannelli als Mahri |
 | Vladimir Sokoloff als Dr. Lorentz |
| Al Zimbalist | Producer |
| Jack J. Gross | Executive Producer |
| Philip N. Krasne | Executive Producer |
| Ray Flin | Director of Photography |
| Albert Glasser | Original Music Composer |
| Kenneth G. Crane | Editor |
| Ernst Fegté | Production Design |
| Kenneth G. Crane | Director |
| Louis Vittes | Screenplay |
| Endre Bohem | Screenplay |
| John Greenwald | Assistant Director |
| Doris Moody | Script Supervisor |
| Jess Davison | Special Effects |
| Charles Diltz | Sound Editor |
| Robert Post | Music Editor |
| Robert Roderick | Sound |
| Stanley Cooley | Sound |
| G. W. Berntsen | Set Decoration |
| Robert R. Benton | Property Master |
| Louis Haszillo | Makeup Artist |
| Joseph Dimmitt | Wardrobe Master |
| Jack Rabin | Special Effects |
| Louis DeWitt | Special Effects |
| Sol Dolgin | Associate Producer |
| Byron Roberts | Production Manager |
| Joseph Dimmitt | Costumer |
