Killers from Space

While flying over a routine atomic test in Nevada, Dr. Douglas Martin spots a strange fireball on the ground. Suddenly, his plane loses control and crashes; the pilot is killed, but Martin survives, totally unharmed. A medical examination uncovers a mysterious scar on his chest, yet Martin has no recollection of the scar or the aftermath of the crash. His ordeal becomes even more perplexing when he inexplicably steals top-secret information from his military colleagues and delivers it to a cavernous area near the test site. Under restraint and injected with truth serum, Martin recalls the impossible truth: he was saved by a squadron of aliens with far superior intellects and monstrously bulging eyes! What's worse, the invaders are mutating insects and reptiles into gigantic carnivores in their bid to conquer the Earth!