To avoid the life-threatening dangers of manned space exploration, Professor Nordstrom creates highly advanced form of artificial intelligence capable of piloting a starship to other worlds. In order to transmit alien data, the extraordinary robot is infused with a powerful telepathic device that enables it to instantly read and even feel emotions. Danger strikes when a sinister band of covert agents kidnaps Gadge, the professor's 10-year-old grandson. But Gadge has a powerful ally. For he has developed a psychic, emotional bond with his grandfather's robot. And now Gadge's captors must suffer the wrath of his protective friend. They must face a mechanical monstrosity bent on a killing rampage of revenge and destruction.

In a futuristic city sharply divided between the rich and the poor, the son of the city's mastermind meets a prophet who predicts the coming of a savior to mediate their differences.

The first manned flight to Mars returns after having been out of communications since it had arrived on Mars. What would it reveal?

Eight people at a remote Scottish inn find themselves confronted by a woman from Mars, who has landed her flying saucer for repairs but intends to soon conquer the Earth and enslave its men for breeding purposes.

Starship C57D travels to planet Altair 4 in search of the crew of spaceship "Bellerophon," a scientific expedition that has been missing for twenty years. They find themselves unwelcome by the expedition's lone survivor and warned of destruction by an invisible force if they don't turn back immediately.