Greedy sailors capture a giant lizard off the coast of Ireland and sell it to a London circus. Then its mother shows up.
Marine atomic tests cause changes in the ocean’s ecosystem resulting in dangerous blobs of radiation and the resurrection of a dormant dinosaur which threatens London.
A brilliant surgeon encases his dead son’s brain in a large robot body, with unintended results…
The controlled explosion of an atomic bomb in the Arctic Circle awakens a frozen dinosaur that will wreak havoc in New York City.