Dr. Cranum uses his brain machine to become a futuristic menace. Two boys joyride in an airplane. Rock creatures threaten civilization. A supertanker captain becomes reckless.

An aquatic alien force is threatening Earth, A girl is kidnapped while hitchhiking, an Earth city is shrunken and abducted by aliens, a space shuttle's botched docking with a space station disastrously cripples their power systems.