Karlheinz Böhm
Mark Lewis
Loner Mark Lewis works at a film studio during the day and, at night, takes racy photographs of women. Also he's making a documentary on fear, which involves recording the reactions of victims as he murders them. He befriends Helen, the daughter of the family living in the apartment below his, and he tells her vaguely about the movie he is making.
Peeping Tom
Mark Lewis
Vivian
Helen Stephens
Mrs. Stephens
Dora
Elderly Gentleman Customer
Arthur Baden
Dr. Rosen
Don Jarvis
Chief Insp. Gregg
Pauline Shields
Milly
Small Man (uncredited)
Shop Assistant on Film Set (uncredited)
Det. Sgt. Miller (uncredited)
Mark's Father - A.N. Lewis (uncredited) / Director / Producer
Lorraine the Model (uncredited)
Det. Baxter (uncredited)
Clapper Boy (uncredited)
Young Man in Sports Car (uncredited)
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