A neurosurgeon with a cheating wife takes an amnesiac into his home and conditions him to believe that the cheating wife is his own and to take the "appropriate" action.
You can now watch Someone Behind the Door online on the following streaming providers in the United States.
| Directing | Nicolas Gessner | Director |
| Camera | Pierre Lhomme | Director of Photography |
| Writing | Jacques Robert | Novel |
| Production | Raymond Danon | Producer |
| Production | Nicolas Gessner | Producer |
| Production | Maurice Jacquin | Producer |
| Sound | Georges Garvarentz | Original Music Composer |
| Editing | Victoria Mercanton | Editor |
| Art | Jean-André d'Eaubonne | Production Design |
| Writing | Marc Behm | Adaptation |
| Writing | Nicolas Gessner | Adaptation |
| Writing | Lorenzo Ventavoli | Writer |
