Crash-landing on Taurus II, the seven crewmembers aboard the Shuttlecraft Galileo are unable to communicate with the Enterprise or to escape the planet's atmosphere and its hostile, giant natives. Spock's first command finds him with a restless crew as he faces the failures of logic at every turn.
The Robinsons set up camp on a planet populated by strangely evolving life forms. As the family moves their camp in search of warmth, they are confronted by a giant Cyclops.
Jennifer Beale is abducted in the hopes her rich father, Joshua, the richest silver baron on the Comstock, will pay a $1M ransom. The plan unravels when the beautiful Della is killed and Hercules, who loves her, finds out who did it.
