Trailer
 | Glenn Ford as Prof. Andrew 'Andy' Patterson |
 | Rosemary Forsyth as Vivian Masters Patterson |
 | Dean Jagger as Chad Harmon |
 | Maurice Evans as Harry Masters |
 | Will Geer as Mike Patterson |
 | Eduard Franz as Dr. Konstantin Horvathy |
 | William Conrad as Bart Harris |
 | Robert Pine as Phillip Dunning |
 | William Smithers as Dr. Jerry Fielder |
| Logan Field as Thaddeus Burns |
 | Dabney Coleman as Agent Shepard |
| Scott Graham as Weber |
 | James McEachin as Police Detective |
 | Robert Clarke as Dr. Louis Bauier (uncredited) |
| Lisabeth Hush as Betty Fielder (uncredited) |
 | Mark Roberts as DA Avery Hazelton (uncredited) |
| Sound | |
| Jerry Goldsmith | Original Music Composer |
Art | |
| Ray Molyneaux | Set Decoration |
Production | |
| Michael S. Glick | Unit Production Manager |
| David Karp | Producer |
Writing | |
| David Karp | Writer |
Camera | |
| Robert B. Hauser | Director of Photography |
Editing | |
| Carroll Sax | Editor |
Directing | |
| Kurt Neumann | Assistant Director |
Production | |
| Edward O. Denault | Production Manager |
Directing | |
| Paul Wendkos | Director |
Production | |
| Hoyt Bowers | Casting |
Sound | |
| Morton Stevens | Music Supervisor |
Production | |
| Hugh Benson | Executive Producer |
Art | |
| William Craig Smith | Art Direction |
Costume & Make-Up | |
| Gale McGarry | Hairstylist |
| Lou LaCava | Makeup Artist |
| Constance Edney | Costume Design |
| Richard Egan | Costume Design |
Sound | |
| Jerry Kosloff | Sound Mixer |
