Cyril Frankel Director Gwen Watford Sally Carter Actor Patrick Allen Peter Carter Actor Felix Aylmer Clarence Olderberry Sr. Actor Alison Leggatt Martha Actor Bill Nagy Clarence Jr Actor Michael Gwynn Prosecutor Actor Janina Faye Jean Carter Actor Estelle Brody Eunice Kalliduke Actor Robert Arden Tom Demarest Actor Vera Cook Mrs. Demarest Actor Gaylord Cavallaro Neal Phillips Actor Helen Horton Sylvia Kingsley Actor Michael Hammond Sammy Nash Actor Peter Carlisle Usher Actor Mark Baker Actor John Bloomfield Foreman of Jury Actor Charles Maunsell Janitor Actor Jack Lynn Dr. Montfort Actor William Abney 1st Policeman Actor Tom Busby 2nd Policeman Actor John Hunter Screenwriter Anthony Hinds Producer Michael Carreras Executive Producer Fred Francis Cinematographer Alfred Cox Film Editing