An investigation involving a phony diamond leads Belgian super-sleuth Hercule Poirot (Peter Ustinov) to a luxury island resort in the Adriatic. The woman (Diana Rigg) he was traveling there to question is found strangled to death, leaving Poirot to make his way through a list of nine suspects-none of whom were particularly fond of the deceased. James Mason, Roddy McDowall, Maggie Smith also star in Agatha Christie's whodunit. 117 min. Widescreen; Soundtrack: English; Subtitles: English; audio commentary; "making of" featurette; radio spots; theatrical trailer.