What was the famous film and TV series featuring U-Boat commander Alfred Radermacher?
Alfred Radermacher:  Radermacher was subsequently portrayed in both the novel and film versions of the war patrol, known as "Das Boot". Das Boot:  It has been exhibited both as a theatrical release and as a TV miniseries (1985), in several different home video versions of various running times, and in a longer director's cut version supervised by Petersen in 1997.
i don't know