Jürgen Prochnow (IPA: [ˈjʏɐɡən ˈpʁɔxnoː]; born 10 June 1941) is a German actor. His best-known roles internationally have been as the sympathetic submarine captain in Das Boot (1981), Duke Leto Atreides I in Dune (1984), the minor but important role of Kazakh dictator General Ivan Radek in Air Force One, and the antagonist Maxwell Dent in Beverly Hills Cop II.