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