Jason, a fearless sailor and explorer, returns to his home land of Thessaly after a long voyage to claim his rightful throne. He learns, however, that he must first find the magical Golden Fleece. To do so, he must embark on an epic quest fraught with fantastic monsters and terrible perils.
| Writing | Jan Read | Screenplay |
| Writing | Beverley Cross | Screenplay |
| Editing | Maurice Rootes | Editor |
| Sound | Bernard Herrmann | Original Music Composer |
| Production | Charles H. Schneer | Producer |
| Crew | Apollonios Rhodios | Poem |
| Camera | Wilkie Cooper | Director of Photography |
| Directing | Don Chaffey | Director |
| Visual Effects | Ray Harryhausen | Visual Effects |
| Art | Tony Sarzi-Braga | Art Direction |
| Sound | Bernard Herrmann | Conductor |
| Production | Paul Maslansky | Unit Manager |
| Sound | Cyril Collick | Sound Recordist |
| Sound | Alfred Cox | Sound Editor |
| Sound | Red Law | Sound Recordist |
| Art | Jack Maxsted | Art Direction |
| Production | John Dark | Production Executive |
| Art | Herbert Smith | Art Direction |
| Directing | Phyllis Crocker | Continuity |
| Production | Ray Harryhausen | Associate Producer |
| Camera | Harry Gillam | Camera Operator |
| Production | Jimmy Komisarjevsky | Unit Manager |
| Art | Geoffrey Drake | Production Design |
| Production | Leonardo Scavino | Unit Manager |
| Directing | Dennis Bertera | Assistant Director |
| Art | James Wines | Title Designer |
| Crew | Eddie Powell | Stunts |
