Cast
Laurence Payne
Norman Martell
Patricia Dainton
Helen Martell
Lucy Griffiths
Miss Potter
Cleo Laine
Cleo
Edward Underdown
Dr. Peter Murdoch
John Arnatt
Supt. Ross
Dudley Moore
Rehearsal Pianist (Uncredited)
Max Faulkner
Det. Sgt. Fred Smith (uncredited)
Pat Ryan
Detective Examining Tape-Recorder (uncredited)
Stuart Saunders
Cinema manager (uncredited)
Jane Griffiths
Peggy Hill
Humphrey Lestocq
Simmons, the Producer
Arthur Hewlett
Marshall
Annette Kerr
Cinema cashier