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.
| Writing | France Image | Dialogue |
| Visual Effects | Isabelle Piet | Animation |
| Writing | Alain Garcia | Lyricist |
| Crew | Jacques Capo | Cinematography |
| Visual Effects | Jean-Pierre Tardivel | Animation |
| Sound | Bernard Mauguière | Sound Designer |
| Art | Serge Nadaud | Set Supervisor |
| Sound | Lionel Leroy | Theme Song Performance |
| Art | Gérard Ollivier | Decorator |
| Sound | Gilbert Nottin | Foley |
| Camera | Jacques Charrier | Director of Photography |
| Writing | Haim Saban | Lyricist |
| Crew | Vincent Levan | Special Effects |
| Art | Enrique Gonzalez | Decorator |
| Writing | France Image | Writer |
| Visual Effects | Yvon Perru | Animation |
| Visual Effects | Jean-Luc Ballester | Animation |
| Sound | Haim Saban | Original Music Composer |
| Writing | Jean Image | Screenplay |
| Visual Effects | Eric Berthier | Animation |
| Visual Effects | Jean Gillet | Animation |
| Visual Effects | Denis Boutin | Animation |
| Directing | Jean Image | Director |
| Sound | Shuki Levy | Original Music Composer |
| Editing | Jacques Charrier | Editor |
