Jessica Barrett, wife and mother of two young children, begins to show signs of demonic possession while pregnant with her third child. As she seeks help from her husband and doctor, a mysterious man approaches her and seems to have some answers.

Directed by: Ovidio G. Assonitis & Robert Barrett
Written by: Ovidio G. Assonitis & Robert Barrett & Antonio Troiso
Release date: 1974-11-21
Runtime: 109 minutes
Tagline: Evil grows beyond the door!
Related titles:
Cast:
Juliet Mills Juliet Mills
Jessica Barrett 
Gabriele Lavia Gabriele Lavia
Robert Barrett 
Richard Johnson Richard Johnson
Dimitri 
Nino Segurini Nino Segurini
Dr. George Staton 
Elizabeth Turner Elizabeth Turner
Barbara Staton 
Barbara Fiorini Barbara Fiorini
Gail Barrett 
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Also known as:
  • Beyond the Door
  • The Devil Within Her
  • A Demon Beyond the Door
  • Diabolica
  • Poder maléfico
  • Le démon aux tripes
  • Vom Satan gezeugt