The film follows the adventures of Baron Munchausen, who is prompted to travel to the moon by his cousin Sirius, an astrologer convinced that it is inhabited by an ancient race called the Selenites. The Selentites incidentally possess the secret of immortality. The Baron takes up his cousin's offer and travels to the moon using a tall masted ship pulled by three hot air balloons and he is aided by his super-ability friends (who are from the prequel to this film, The Fabulous Adventures of the Legendary Baron Munchausen). When they reach the moon, they are initially placed in jeopardy as their craft lands in a crater and they fall into a subterranean sea inhabited by monsters...
Unfortunately the movie The Secret of the Selenites is not yet available on HBO Max.
| Art | Gérard Ollivier | Decorator |
| Writing | France Image | Dialogue |
| Writing | France Image | Writer |
| Writing | Jean Image | Screenplay |
| Art | Enrique Gonzalez | Decorator |
| Visual Effects | Eric Berthier | Animation |
| Visual Effects | Denis Boutin | Animation |
| Visual Effects | Jean Gillet | Animation |
| Visual Effects | Jean-Pierre Tardivel | Animation |
| Visual Effects | Yvon Perru | Animation |
| Visual Effects | Isabelle Piet | Animation |
| Visual Effects | Jean-Luc Ballester | Animation |
| Writing | Alain Garcia | Lyricist |
| Sound | Lionel Leroy | Theme Song Performance |
| Writing | Haim Saban | Lyricist |
| Sound | Haim Saban | Original Music Composer |
| Sound | Bernard Mauguière | Sound Designer |
| Sound | Gilbert Nottin | Foley |
| Art | Serge Nadaud | Set Supervisor |
| Crew | Vincent Levan | Special Effects |
| Camera | Jacques Charrier | Director of Photography |
| Crew | Jacques Capo | Cinematography |
| Directing | Jean Image | Director |
| Sound | Shuki Levy | Original Music Composer |
| Editing | Jacques Charrier | Editor |
