Montgomery Tully (Director) · Maurice J. Wilson (Screenplay)
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)
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A composer is stuck in a middle-class marriage and finds that his affair with his wife's half-sister 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.
