Montgomery Tully Director, Screenwriter Terence Longdon Martin Lord Actor Jennifer Jayne Nita Lord Actor Harry Fowler Doug Roberts Actor Peter Sallis Victor Lush Actor Alan Wheatley Ronald Grey-Simmons Actor Vanda Godsell Mrs. Grey-Simmons Actor Arthur Lovegrove Ernie Peel Actor Hilda Fenemore Mrs. Peel Actor Mark Dignam Sydney Selwyn Actor John Arnatt Inspector Croft Actor Richard Carpenter Danny Watts Actor Stanley Meadows George Brett Actor Robert Brown Mawsley Actor Tom Bowman Bart Rennison Actor Maurice J. Wilson Screenwriter, Producer Rupert Croft-Cooke Writer Maurice Rootes Film Editing Frank White Art Director Geoffrey Faithfull Cinematographer