Server
After the entire Robinson food supply is wiped out in a freak storm a trader arrives to trade food for equipment the Robinson's possess. Dr. Smith trades the robot for food and hoards the supplies for himself. Later, after the Robinson's discover his transaction he gets the robot back but in exchange for his own self. The Trader then wants to take Smith as a slave, to another planet.
Episodes
1The Reluctant Stowaway 2The Derelict 3Island in the Sky 4There Were Giants in the Earth 5The Hungry Sea 6Welcome Stranger 7My Friend, Mr. Nobody 8Invaders from the Fifth Dimension 9The Oasis 10The Sky Is Falling 11Wish Upon a Star 12The Raft 13One of Our Dogs Is Missing 14Attack of the Monster Plants 15Return from Outer Space 16The Keeper (1) 17The Keeper (2) 18The Sky Pirate 19Ghost in Space 20War of the Robots 21The Magic Mirror 22The Challenge 23The Space Trader 24His Majesty Smith 25The Space Croppers 26All That Glitters 27The Lost Civilization 28A Change of Space 29Follow the Leader