Lt. Col. Glenn Manning is inadvertently exposed to a plutonium bomb blast and although he sustains burns over 90% of his body, he survives. Then he begins to grow, but as he grows he starts losing his mind. By the time he stops he is 50 ft tall, insane and is on the rampage.
| Directing | Bert I. Gordon | Director |
| Writing | Bert I. Gordon | Screenplay |
| Writing | Mark Hanna | Screenplay |
| Production | Bert I. Gordon | Producer |
| Writing | George Worthing Yates | Writer |
| Sound | Albert Glasser | Original Music Composer |
| Production | James H. Nicholson | Executive Producer |
| Camera | Joseph F. Biroc | Director of Photography |
| Production | Samuel Z. Arkoff | Executive Producer |
| Editing | Ronald Sinclair | Editor |
| Costume & Make-Up | Joan St. Oegger | Hairstylist |
| Costume & Make-Up | Robert J. Schiffer | Makeup Artist |
| Art | Glen Daniels | Set Decoration |
| Production | Jack R. Berne | Production Supervisor |
| Costume & Make-Up | Bob Richards | Costume Design |
| Art | William Glasgow | Production Design |
| Directing | Jack R. Berne | Assistant Director |
| Art | Paul Blaisdell | Props |
| Crew | Flora M. Gordon | Special Effects Assistant |
