Alan Birkinshaw Director Donald Pleasence Mr. Justice Lawrence Wargrave Actor Frank Stallone Capt. Philip Lombard Actor Sarah Maur Thorp Vera Claythorne Actor Herbert Lom Gen. Brancko Romensky Actor Brenda Vaccaro Marion Marshall Actor Warren Berlinger Det. William Henry Blore Actor Yehuda Efroni Dr. Hans Yokem Werner Actor Paul L. Smith Elmo Rodgers Actor Moira Lister Ethel Mae Rodgers Actor Neil McCarthy Anthony Marston Actor Harry Alan Towers Producer Agatha Christie Screenwriter Avi Lerner Executive Producer Arthur Lavis Cinematographer Penelope Shaw Film Editing George S. Clintoni Original Music George Canes Art Director Diana Cilliers Costume Design Gianna Pisanello Casting