Someone Behind the Door is based on the French novel by Jacques Robert "Quelqu'un derriere la porte". In the novel the neurosurgeon (played by Anthony Perkins) is a writer and the Mystery Man 'behind the door'(Charles Bronson) is a fictitious character from the novel he's writing. The novel's fantasy world of writing became the movie's realistic and dramatic psychological duel between Perkins and Bronson.
Review of Someone Behind the Door
