


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

Michael Goodliffe
Don Jarvis

Jack Watson
Chief Insp. Gregg

Shirley Anne Field
Pauline Shields

Pamela Green
Milly
John Barrard
Small Man (uncredited)

Robert Crewdson
Shop Assistant on Film Set (uncredited)

Nigel Davenport
Det. Sgt. Miller (uncredited)

Michael Powell
Mark's Father - A.N. Lewis (uncredited)

Susan Travers
Lorraine the Model (uncredited)

Keith Baxter
Det. Baxter (uncredited)
John Chappell
Clapper Boy (uncredited)

Roland Curram
Young Man in Sports Car (uncredited)
Michael Powell
Leo Marks
Released