Beyond the Door (Italian: Chi sei?, lit. "Who are you?") is a 1974 horror film co-directed by Ovidio G. Assonitis and Robert Barrett, and starring Juliet Mills and Richard Johnson. The plot follows a San Francisco housewife who becomes demonically possessed.

Plot

Jessica Barrett is a young mother in San Francisco. Her family and friends begin to notice odd behavior around the time she falls pregnant with her third child. As the strangeness intensifies, Jessica begins to display signs of demonic possession including spinning her head all the way around and projectile vomiting.