Malpertuis is the name of an old, rambling mansion which is in reality a labyrinth where characters from Greek mythology are imprisoned by the bedridden Cassavius. He manages to keep them, as well as his nephew and niece, prisoners even after his death, through a binding testament. As Jan, the nephew, unravels the mystery, he discovers that he cannot escape the house because Malpertuis is far more significant than he was led to believe.
Unfortunately the movie Malpertuis is not yet available on HBO Max.
| Editing | Richard Marden | Editor |
| Writing | Jean Ray | Novel |
| Production | Ritta Laffargue | Producer |
| Camera | Gerry Fisher | Director of Photography |
| Writing | Jean Ferry | Screenplay |
| Art | Pierre Cadiou | Production Design |
| Production | Paul Laffargue | Producer |
| Sound | Georges Delerue | Original Music Composer |
| Directing | Harry Kümel | Director |
| Production | Pierre Levie | Producer |
| Costume & Make-Up | Claudine Thyrion | Makeup Artist |
| Costume & Make-Up | John O'Gorman | Makeup Artist |
| Costume & Make-Up | Odette Van Der Greyn | Makeup Artist |
| Costume & Make-Up | Claire-Lise Leisegang | Costume Design |
| Sound | Paul Cayatte | Sound Editor |
| Sound | Jacques Eippers | Sound |
| Production | Jean-Philippe Mérand | Production Manager |
| Sound | Henri Morelle | Sound |
