Agatha Christie's story has more twists and turns than a roller coaster and this provides a strong foundation for the movie. But the actors give life to the characters. I haven't seen the 1982 version, but I'll admit to a bias for Marlene Dietrich. She and Tyrone Power pull just the right punches.
It's a mystery, of course. But a top notch one. So if you want only to dabble in the genre, this is the one to try. (If you like mysteries, it goes without saying that you must see it.) Moreover, this is one B&W movie for people who don't like B&W movies.
