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.
| Camera | Pierre Lhomme | Director of Photography |
| Directing | Nicolas Gessner | Director |
| Writing | Jacques Robert | Novel |
| Sound | Georges Garvarentz | Original Music Composer |
| Production | Raymond Danon | Producer |
| Writing | Nicolas Gessner | Adaptation |
| Production | Nicolas Gessner | Producer |
| Production | Maurice Jacquin | Producer |
| Editing | Victoria Mercanton | Editor |
| Writing | Marc Behm | Adaptation |
| Art | Jean-André d'Eaubonne | Production Design |
| Writing | Lorenzo Ventavoli | Writer |
