
A composer (Laurence Payne) is stuck in a middle-class marriage and finds that his affair with his wife's half-sister (Jane Griffiths) has resulted in a pregnancy. When his wife refuses to give him a divorce he hatches a murder scheme that is too clever by half.
Cast

Laurence Payne
Norman Martell

Patricia Dainton
Helen Martell

Jane Griffiths
Peggy Hill

Edward Underdown
Dr. Peter Murdoch

John Arnatt
Supt. Ross

Humphrey Lestocq
Simmons, the Producer

Lucy Griffiths
Miss Potter
Olive Milbourne
Mrs. Booth

Arthur Hewlett
Marshall

Annette Kerr
Cinema cashier

Cleo Laine
Cleo

Dudley Moore
Rehearsal Pianist (Uncredited)
Sylvia Davis
Cinema sales girl (uncredited)

Max Faulkner
Det. Sgt. Fred Smith (uncredited)
Garard Green
Patrol car policeman (uncredited)
Arthur Howell
P.C. Williams (uncredited)
Richard Neller
Sleeping Man in Theater (uncredited)

Pat Ryan
Detective Examining Tape-Recorder (uncredited)

Stuart Saunders
Cinema manager (uncredited)
Arthur Skinner
Det. Sgt. Carter (uncredited)
John Tatham
Detective / Fingerprints Officer (uncredited)
Crew

Montgomery Tully
Director, Screenplay
Maurice J. Wilson
Screenplay, Producer
Jim Connock
Editor
Walter J. Harvey
Director of Photography
David Tringham
First Assistant Director
John Shinerock
Camera Operator
Evelyn Gibbs
Wardrobe Master
Hilda Fox
Hairdresser
Richard Mills
Makeup Artist
Dick Smith
Sound Recordist
Don Banks
Original Music Composer
Philip Martell
Music Director
Estelle Stewart
Continuity
Pat Marsden
Production Manager
Jane Baker
Theatre Play
Philip Baker
Theatre Play
William Hutchinson
Art Direction
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