It Came from Beneath the Sea

The state-of-art atomic submarine under the command of Commander Pete Mathews is hold back by something weird in the sea. Pete reports to the Admiral and contacts the prominent scientists Prof. Lesley Joyce and Dr. John Carter to investigate. They conclude that the submarine was attacked by a giant radioactive octopus developed from bombing tests in the Pacific Ocean that would threaten the oceans. The Navy Command does not accept the explanation, but when a ship is sunk by the octopus, they realize the menace. Cmdr. Mathews teams-up with Carter and Joyce and has a love affair with her. But soon the monster attacks San Francisco and the trio is the only chance to stop the creature.