Atomic tests conducted by a coerced dissident scientist wake the ancient dragon Grogg. The dragon chases the soldiers into a cave in the mountains and their commander tries to appease it by sending out the scientist, but he uses a smoke bomb to escape and eventually makes his way to the United States. No one believes his story, but he knew that dragons like Grogg existed even before the tests, and hoped that disturbing one would gain him the chance to escape.; Space explorers are attacked by alien animals, and only make the situation worse by killing the largest beast, which was actually a robot holding the animals in check. They narrowly escape.