 In "20,000 Leagues Under the Sea" (1954), Douglas showed that in addition to serious, driven characters, he was adept at roles requiring a lighter, comic touch.In this adaptation of the Jules Verne novel, he played a happy-go-lucky sailor who was the opposite in every way to the brooding Captain Nemo (James Mason).The film was one of Walt Disney's most successful live-action movies and a major box-office hit.