Young doctor Garondet is summoned by renowned Professor Orloff. At Orloff's castle, Garondet discovers that the mad scientist has created an invisible yet murderous apeman.
| Crew | Juan Fortuny | Special Effects |
| Writing | Pierre Chevalier | Screenplay |
| Writing | Juan Fortuny | Screenplay |
| Directing | Pierre Chevalier | Director |
| Production | Marius Lesoeur | Producer |
| Editing | Albert Gasset Nicolau | Editor |
| Editing | Fernande Pineau | Editor |
| Camera | Raymond Heil | Director of Photography |
| Camera | Juan Fortuny | Director of Photography |
| Writing | Juan Fortuny | Story |
| Writing | Pierre Chevalier | Story |
| Sound | Camille Sauvage | Music |
| Sound | Claude Sauvage | Music |
