Behemoth the Sea Monster

American biologist Steve Karnes and Professor James Bickford of the Atomic Energy Commission travel to Cornwall after news reports of a sea monster being sighted. Fisherman Tom Trevethan was found by his daughter Jean and her friend John on the beach with severe burns, which led to his death. With large numbers of dead fish floating ashore, the fishing industry has come to a standstill. Soon, large ships are foundered with crews suffering from severe burns. Karnes and Bickford believe atomic waste may be behind it all, but find a prehistoric beast that the waste has awakened.