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.
Karlheinz Böhm
Mark Lewis
Moira Shearer
Vivian
Anna Massey
Helen Stephens
Maxine Audley
Mrs. Stephens
Brenda Bruce
Dora
Miles Malleson
Elderly Gentleman Customer
Esmond Knight
Arthur Baden
Martin Miller
Dr. Rosen
