The action is wet and wild in this sci-fi thriller that pits man - and woman - against a giant octopus. Submarine commander Pete Mathews and scientists Lesley Joyce and John Carter battle an angry sea monster driven from the depths of the ocean by an H-bomb explosion. In search of non-contaminated food, this tentacled tyrant counts among its victims a fishing trawler and its passengers, a family sunning at the beach, several San Francisco skyscrapers and even the Golden Gate Bridge! A daring attempt by the scientists to destroy the monster while saving themselves is a gripping finale to this aquatic adventure. The riveting special effects were created by Ray Harryhausen.