Ro-Man, an alien robot who greatly resembles a gorilla in a diving helmet, is sent to earth to destroy all human life. Ro-Man falls in love with one of the last six remaining humans, and struggles to understand how his programming can instruct him to kill her while his heart demands that he can't.
You can now watch Robot Monster online on the following streaming providers in the United States.
| Directing | Phil Tucker | Director |
| Production | Phil Tucker | Producer |
| Sound | Elmer Bernstein | Original Music Composer |
| Camera | Jack Greenhalgh | Director of Photography |
| Editing | Merrill G. White | Editor |
| Writing | Wyott Ordung | Screenplay |
| Production | Alan Winston | Associate Producer |
| Production | Al Zimbalist | Executive Producer |
| Costume & Make-Up | Stanley E. Campbell | Makeup Artist |
| Production | Clarence Eurist | Production Supervisor |
| Directing | Robert E. Barnes | Assistant Director |
| Art | John Orlando | Property Master |
