The Jupiter 2 lands on a planet which apparently serves space as a junkyard. The Robinson's food supply is dwindling, so Dr. Smith tries to sell the robot and the ship in order to get food.moreless
Don West and Dr. Smith are installing some equipment when Dr. Smith comes across an alien prison escapee. The prisoner alien makes Dr. Smith change jackets and then runs away. When the prison guards catch up with Smith and West, they arrest them for aiding the escape of a prisoner.moreless
Rocketing through space, the Robot suddenly announces that the Jupiter 2 is approaching Alpha Centauri. Everyone is surprised, and the ship lands on a planet, where they are greeted by a group of people who appear to be teenagers from Earth. It turns out that they are aliens who live like Earth-style hippies, and they are incapable of growing old.moreless
Will Robinson meets a man in a cave who may hold the solution to helping them get to Alpha Centauri.
Dr. Smith and Penny are entrusted with a valuable amulet after saving an alien's life. However, trouble soon arrives in the form of space thugs, and they want the amulet.
The Robinsons' communications system is knocked out, and they discover that the culprit is a female warrior, who is planing on making their planet a colony for her people.