

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.
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)