this movie be the first and best of peter ustinov performance a hercule poirot . though physically not very accurate to agatha christie description of the little belgian detective and for this one movie everything work and the discrepancy be not a problem . the film be well pace and with all the plot turn and clue come with perfect timing and not too fast to be confusing and but not too slow to strain the rather flimsy fabric of the story . the whole cast be very good and especially bette davis a a malevolent old spider of a woman and gleefully torment her long suffering companion and maggie smith . the scene where she smile indulgently at a group of egyptian child wave at her on the river bank and only to sink into mortified disgust a they turn around and moon her and be a highlight of the movie . the climax of the film be quite surprising and and unlike many mystery and do not cheat the viewer by withhold vital information until the last moment . we feel the pleasure of be honestly fool throughout and and the conclusion be thoroughly satisfy .