Dead fish by the thousands begin washing up on the shores of Cornwall, England, and finally an old fisherman is killed by something which has left him covered with radiation burns, his dying word being "behemoth". An Anglo-American team of scientists are dispatched from London to investigate, and discover the dead fish are also radioactive. Further investigation reveals a large, glowing animal swimming below the surface of the sea, and on another night it comes out and "burns" a farmhouse and its occupants, leaving footprints the length of a police car. From a picture of one print, a paleontologist determines the animal is a [fictional] Paeleosaurus that can project electric shocks and is saturated with radiation. The dinosaur enters the River Thames and surfaces and attacks the city of London. The scientists realize that if it is destroyed by conventional military weaponry, a large amount of radioactive contamination will be released. The military then concludes to use a mini-submarine capable of shooting a torpedo missile with enough additional radioactivity inside the warhead to overdose the behemoth and destroy it. The American scientist and one of the younger Cornish fishermen, boyfriend of the daughter when the first man was killed take the mini-sub out, aimed at the pest and successfully shoot the behemoth.
THE GIANT BEHEMOTH
EUGENE LOURIE (1959)