Scientists track down a radioactive sea monster off the coast of Britain. An A-bomb, of course, sets free a dinosaurlike creature which immediately heads for London to chew up the city's great historical landmarks (Monsters never bother the slums.) Evans finally does the monster in by
shooting a torpedo filled with radium into its bulk. But before it goes--just one more landmark, please--it crushes London Bridge with its death-rattling tail. The low budget torpedoed this effort.