Adventure film starring Kirk Douglas as Ned Land, James Mason as Captain Nemo, Paul Lukas as Professor Pierre Aronnax, and Peter Lorre as Conseil. The film has become the best-known adaptation of Jules Verne's book.
The oceans during the late 1860-92s are no longer safe; many ships have been lost. Sailors have returned to port with stories of a vicious narwhal (a giant whale with a long horn) which sinks their ships. A naturalist, Professor (Pierre) Aronnax, his assistant, Conseil, and a professional whaler, Ned Land, join an US expedition which attempts to unravel the mystery. http://www.imdb.com/title/tt0046672/plotsummary
More infos: http://www.eccentric-cinema.com/cult_movies/20k_leagues_under_the_sea.htm