The electronic engineer Dr. Cal Meacham is a prominent scientist that is studying industrial application of nuclear energy and also a great pilot. One day, he receives a different condenser and soon his assistant Joe Wilson receives a manual instruction and several components of a sophisticated machine. Carl and Joe build a communication apparatus and a man called Exeter contacts Carl. He tells that Carl has passed the test assembling the Interocitor and invites him to join his research. The intrigued Carl decides to travel to meet Exeter that sends an unmanned airplane to bring him to an isolated facility in Georgia. He is welcomed by Dr. Ruth Adams but she mysteriously does not recall their love affair in the past. They team-up with Dr. Steve Carlson and they note that the other scientists in the facility have been transformed, having a weird behavior. They decide to flee in a car, but they are attacked by rays and Steve dies. Carl and Ruth also witness the facility blowing-up and ...

A young boy's discovery of a colorful, wish-granting rock causes chaos in the suburban town of Black Falls when jealous kids and scheming adults alike set out to get their hands on it.

In California, an old man (Bela Lugosi) grieves the loss of his wife (Vampira) and on the next day he also dies. However, the space soldier Eros and her mate Tanna use an electric device to resurrect them both and the strong Inspector Clay (Tor Johnson) that was murdered by the couple. Their intention is not to conquest Earth but to top mankind from developing the powerful bomb "Solobonite" that would threaten the universe. When the population of Hollywood and Washington DC sees flying saucers on the sky, a colonel, a police lieutenant, a commercial pilot, his wife and a policeman try to stop the aliens.

Extra-terrestrials flying in high tech flying saucers contact scientist Dr. Russell Marvin as part of a plan to enslave the inhabitants of Planet Earth.