Marlon Brando captures the extraordinary contradictions and complexity of a decent man who becomes a Nazi officer. The Young Lions tells the story of World War II from both sides. The American, represented by Montgomery Clift and Dean Martin. And the German, made tragically vivid by Brando. Based on the novel by Irwin Shaw, The Young Lions is a provocative, insightful movie. It is also one of Brando's all-time best.