Michael Winner Director, Screenwriter, Producer, Film Editing Peter Ustinov Hercule Poirot Actor Lauren Bacall Lady Westholme Actor Carrie Fisher Nadine Boynton Actor John Gielgud Colonel Carbury Actor Piper Laurie Emily Boynton Actor Hayley Mills Miss Quinton Actor Jenny Seagrove Dr. Sarah King Actor David Soul Jefferson Cope Actor Anthony Shaffer Screenwriter Peter Buckman Screenwriter Yoram Globus Executive Producer Menahem Golan Executive Producer David Gurfinkel Cinematographer Pino Donaggio Original Music John Blezard Production Design Avi Avivi Art Director Alan Cassie Set Decoration John Bloomfield Costume Design Dyson Lovell Casting