
The Robinson family was supposed to set off on a five-year mission to explore a distant planet, but an act of sabotage by the scheming Dr. Zachary Smith -- who managed to get himself trapped aboard the spaceship -- leaves them adrift in space for three years. The Robinsons, pilot Don West, Dr. Smith and their trusty robot move from planet to planet, always searching for a way to return to Earth.

An evil mechanism captivates the Robot and plans to use it in her conquests.

A space showman snatches most of the Robinsons for his interplanetary zoo.