Eric Sykes
Mr. Groomkirby
Julia Foster
Sylvia
Peggy Mount
Mrs. Gantry
Mona Washbourne
Aunt Mildred
George Cole
Defence Counsel
Jonathan Miller
Kirby
Alison Leggatt
Mrs. Groomkirby
Douglas Wilmer
Judge
Glyn Houston
Detective Inspector Barnes
Graham Crowden
Prosecuting Counsel
Kenneth Farrington
Stan
Walter Horsbrugh
Clerk of the Court
Frederick Piper
Usher
Vincent Harding
Policeman / Bus Conductor
Tommy Bruce
Gormless (voice)