The Third Alibi

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)