A space ship crash lands on the third planet of a distant solar system, killing all hands except for a young boy named Tang. The rescue ship arrives some 20 years later. One of the crew, a girl named Linda meets Tang and falls in love with him. They are attacked by the native humanoids of the planet and many of them are killed off. Also, the crew encounters many strange beasts on this strange, but somewhat familiar world.

After being fired from the Space Agency, the disgruntled (not to mention crazy) Dr. DeMarco creates an Astroman from a criminal’s dead body. However, he loses control of his creation, which goes on a killing spree, attracting the attention of an international spy ring and the CIA.

The head of the Human Aetiological Relations Machine pits an agent against a flesh-to-fungus spore gun.