Jürgen Prochnow ( ; born 10 June 1941) is a German-American actor. His best-known roles are: the U-Boat captain in "Das Boot" (1981), Duke Leto Atreides in "Dune" (1984), the minor but important role of Kazakh dictator General Ivan Radek in "Air Force One" (1997), and the antagonist Maxwell Dent in "Beverly Hills Cop II" (1987).