Someone Behind the Door (1971) is a Thriller, Crime, Drama film that follows 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. Currently, you can watch Someone Behind the Door on Amazon Prime Video, FlixFling, Amazon Prime Video with Ads, Amazon Video. Streaming availability may vary by country and platform over time. It has a user rating of 5.5 out of 10 from 39 votes. Fans of thriller movies may also want to explore similar titles below.