Alfred Hitchcock Host, Executive Producer Don Taylor Prof. Donald Mason Actor, Director Denholm Elliott Jack Lyons Actor Hazel Court Phyllis Chaundry Actor Patricia Hitchcock Aileen Actor John Alderson Inspector Karsiak Actor Arthur Gould-Porter Arthur Chaundry Actor Dan Sheridan Sgt. Rason Actor Frederick Worlock Dan Mintz Actor Laurence Conroy Policeman Actor Robert C. Dennis Writer Roy Vickers Writer