In 1881 Algeria, an American soldier and a French aristocrat are about to have a duel over a woman when a comet hurtling past the Earth draws them into its gravitational pull. The men find themselves transported to the moon, where they discover a prehistoric civilization inhabited by reptiles and humans.
Unfortunately the movie Valley of the Dragons is not yet available on HBO Max.
| Writing | Jules Verne | Novel |
| Directing | Edward Bernds | Director |
| Writing | Edward Bernds | Screenplay |
| Writing | Donald Zimbalist | Story |
| Production | Al Zimbalist | Executive Producer |
| Camera | Brydon Baker | Director of Photography |
| Art | Don Ament | Art Direction |
| Production | Byron Roberts | Producer |
| Sound | Ruby Raksin | Original Music Composer |
| Editing | Edwin H. Bryant | Editor |
| Directing | George Rhein | Assistant Director |
| Crew | Richard Albain | Special Effects |
| Sound | Charles J. Rice | Sound Supervisor |
| Visual Effects | Roy Seawright | Visual Effects |
| Crew | Eiji Tsuburaya | Special Effects |
| Costume & Make-Up | Ben Lane | Makeup Supervisor |
| Sound | Lambert E. Day | Sound |
