The Glass Cell (1978)

Die Gläserne Zelle (The Glass Cell) is an adaptation of a Patricia Highsmith novel. All of the plot synopses on the internet, though, are bogus. What happens in this movie is that a Tom Ripley-like character begins to be very jealous of his wife. He is very likeable, though, and likably played by Helmut Griem. He does not try to turn his kid against his wife or any such thing. Instead, he begins to commit crimes and cover them up, like any good Highsmith character would do. It's very exciting and dangerous and, as usual, I wanted this bad guy to succeed. This is compelling stuff, and I really enjoyed it.