- HD 1080
- Runtime: 97m.
- Status: Released
0
- Languages: en
- Country: France
- Director: Nicolas Gessner
- Stars: Charles Bronson, Anthony Perkins, Jill Ireland, Henri Garcin, Agathe Natanson
- keywords: infidelity, amnesia
- Production_studio: SNC, Comacico, Lira Films
- Slogan: No memory, no name, no mind: This man will act out someone else's insanity and revenge.
- providers: Amazon Prime Video, FlixFling, Amazon Prime Video with Ads
- The Someone Behind the Door is featured in the top rankings of 1971
- #42 in Top Crime Movies of 1971
- #56 in Top Thriller Movies of 1971
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.