Avsnitt 1

Sailing under threat, the United States equips the Blue Star military frigate to find and destroy the sea monster who has been destroying warships of different countries for the last two years. After a three-month unsuccessful search in the ocean, the frigate discovers a monster and attacks it, but as a result gets damaged itself . French professor Pierre Aronax, his servant Conseil and Ned Land whaler fall overboard onto a submarine, the Nautilus.