Behemoth, the Sea Monster

American scientist Steve Karnes (Evans) delivers a speech to a British scientific society, headed by Professor James Bickford (Morell) about the dangers to marine life posed by nuclear testing. A real-life example of his concern materializes when an old fisherman receives a lethal dose of radiation; his dying word is "behemoth" A photo of the area reveals a huge footprint of some prehistoric animal. Dr. Sampson identifies the creature as a "Paleosaurus", an aquatic dinosaur.