The Robinsons board a computer-controlled spacecraft filled with frozen men.
A time warp transports the travelers to a hostile planet – Earth as it was in 1947.
Mechanical men threaten the travelers with death unless someone can fix their robot leader.
John is captured by a maniacal humanoid and made the quarry in a sadistic big-game hunt.
In an attempt to rescue Don and Smith, the Robinsons pit their robot against a computer that rules a race of primitive aliens.
Dr Smith activates a robot-manufacturing machine that turns out an army of obedient automatons.
The Robinsons are endangered by a youngster who has put himself in control of their imaginations.
The space adventurers search for reality in a world of fantastic illusions.
The Robinson's come across a group of space hippies who are trying to destroy the planet the Robinson's currently inhabit.
A blue mist causes the travelers to disappear one by one until only Will is left.
The Robinsons’ robot flips over a mechanical beauty programmed for pure evil. Robot: Bob May.
The space travelers try desperately to end a day at the zoo in which they have become specimens.
Smith turns the Jupiter 2 into a hotel for humanoids, unaware that they are fugitives from space justice.
A bandit threatens to hold Will until the Robinsons hand over a defrosted ice princess.
Will and the robot try to rescue the kidnapped Prof. Robinson in a macabre world of orange grass, polka-dotted leaves, and animated rocks.
Will tries to brew dissension among shapeless aliens who plan to conquer Earth.
Penny agrees to impersonate a long-lost princess to help quash a computer uprising.
Smith tricks a time merchant into returning him to Earth in a process that endangers the Robinsons’ lives.
The Robinsons get a reception on a planet populated by music-loving teenagers.
Don and Smith are convicted on a false charge and sentenced to the toughest prison planet in the galaxy.
Trouble begins when Dr. Smith tricks Judy into entering an enigmatic dictator’s beauty contest.
The Robinsons must contend with a rapidly growing plant and missiles fired by aliens.
The Robinsons land on a planet where plants talk and seek revenge against the animal world.
A galactic junkman threatens to melt down the Jupiter 2 and cannibalize the Robot.