October 16, 1997. The Robinsons become America's first family in space as part of an effort to colonize the Alpha Centauri star system. Their space ship, the "Gemini 12", runs into a meteor shower and goes off course, crashing on an uncharted planet. The Robinsons must deal with adversities such as a giant cyclops, earthquakes, and extreme cold. They also discover the remains of an ancient civilization in a cave.
In 1997, the Robinsons take off on the first mission to colonize space only to discover an enemy agent aboard their spacecraft.
John and Maureen, trying to return to their spaceship, are threatened by a comet.
John descends from the orbiting spaceship to explore a planet that the Robinson's are planning to land on.
The Robinsons discover strange forms of life where they have established a self-sustaining community.
An earthquake threatens to seal the cave where Don, Judy, Will, and Penny are trapped.
The Robinsons are visited by a long-lost astronaut, who agrees to help their children return to Earth.
Penny discovers a deep cave inhabited by an invisible but seemingly friendly voice.
The travelers are menaced by glowing creatures who are looking for a humanoid brain.
The Robinsons face dangers on strange terrain, where water is running low and the heat is getting more intense.
The Robinsons encounter a family of crablike visitors who are far from friendly.
Will and Dr. Smith discover a device that transforms wishes into realities.
The Robinsons construct a two-man vehicle to fly back to Earth.
Dr. Smith and the women discover that their spaceship has been looted.
Plants grow to huge proportions and Smith schemes to steal the canisters containing the spaceship’s fuel supply.
Will disobeys John’s orders to stay away from the matter-transfer unit and is transported back to Earth.
The castaways’ planet is visited by a being traveling the universe to collect creatures—two of every kind.
The Robinsons must turn Penny and Will over or face death.
The Robinsons meet a space traveling Earth man, Alonzo P. Tucker, who was abducted by aliens in 1876.
Smith sets off an explosion in a bog, arousing an invisible, indestructible, and irresistible, creature.
Will finds a rusted, more capable robot, but the Robinsons’ own robot warns him against rebuilding the device.
Penny discovers an extraordinary mirror which reflects a world that does not exist.
The Robinsons encounter a militant boy who is determined to prove his superiority over the earthlings.
The Robinsons are victimized by a huckster who will stop at nothing to get their equipment.
Visitors from Andronica are looking for a king – a position Dr. Smith feels uniquely qualified to fill.
The Robinsons encounter space farmers who grow deadly plants and practice witchcraft.
Penny shelters an interplanetary fugitive who gives her a small disc that is supposedly the key to the greatest treasure in the galaxy.
The Robinson men discover an underground civilization while exploring a huge cave.
Will and Smith, on an alien spaceship, enter the sixth dimension, and emerge with personality changes.
John falls into a cave containing a centuries-old mummy, whose spirit possesses John’s body.
Dr Smith and Will befriend an old miner named Nerim. After a series of earthquakes indicates that the planet is breaking up, Dr Smith tries to convince them that it is merely the effects of mining, and no harm will come to the planet. John informs him that he is wrong and that the Robinson family will be departing within the day. It is a race against time to escape the crumbling planet.
Shortly after leaving their original crash-site planet, Smith spots a familiar star and, in an amazing show of stellar navigational skill, calculates the course to get back to Earth. He extracts a promise from Don and John that they'll return to Earth, or else he'll destroy his navigation data. They agree, but inform the family at dinnertime that they are headed for Alpha Centauri after all, mainly because the Earth is on the other side of the Sun (how do they know that? - do they know the date? And besides, from Alpha Centauri, Earth revolves clockwise, visible all the time). Smith changes course 180 degrees, then clumsily jettisons most of the fuel. They reach a refueling barge, one of several that Alpha Control put out in 1996, top up the tanks, and resume course for Alpha Centauri, not knowing that they've picked up a tailgater who follows them after Smith reverses course to Earth again. The alarm goes off in the night, and they expend a lot of fuel pulling away from the Earth's
Due to Smith's actions the crew has had to land their ship on an alien planet which is run by cyborgs. Meanwhile the crew try to break free from the captors who promise them power and luxury and they have to save their robot who was crippled by a ray gun.
The Robinsons are trapped on a fog-shrouded planet.
A circus threatens to exhaust the Robinsons’ dwindling food supply.
The Galaxy Tribunal of Justice contacts the travelers to tell them they will be tried for crimes committed in space.
Dr Smith is provided with a female robot who declares that she is his, forever.
Smith wants John to enter fight promoter Myko’s intergalactic boxing tournament.
An intergalactic thief forces Will to join his search for a long-lost princess.
Jeremiah Smith plots to liquidate his doctor cousin and claim the family fortune.
Dr Smith is mistaken for a notorious outlaw.
Smith is transported to a hellish place where he becomes the terrified tool of a satanic stranger.
The robot is being used to help create a sinister army of machines.
An alien plans to drain all emotions from the Robinsons.
The Robinson women and Dr Smith become involved in a war between the leaders of two alien civilizations.
Will is green! Smith must fight the evil Urso to restore Will’s normal color.
Will learns the meaning of chivalry and honor when he serves as page to a knight-errant.
Will and Smith are trapped in a four-dimensional toyshop, where a toymaker mistakes them for playthings.
Will and Dr. Smith pursue the first mate who marooned Admiral Zahrt on their planet.
Smith finds the golden hammer of the Norse god Thor and blunders into a twilight zone of the gods.
Smith is keen for the job of sorcerer’s apprentice after learning that a space magician’s rocket ship can reach Earth in a few hours.
Smith is lured into a tomblike cave, where he falls under the spell of a computer.
A space pirate demands that Dr Smith lead him to a buried treasure.
The Robinsons place their lives in jeopardy when they become involved in a revolt of half-human androids.
A female warrior captures the Robinson party and puts the men to work preparing for the arrival of more conquering colonists.
Will and Dr. Smith try to repair the robot, which has grown to the size of a house.
An alien scientist gives Will 24 hours to teach his androids how to act like humans.
To provide themselves with a leader, tiny mechanical men interchange the personalities of Smith and the robot.
While exploring a mysterious cave, Will is transported through space to a haunted Scottish castle.
Aliens enlist Dr Smith’s help to obtain a valuable amulet that could destroy the galaxy.
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.
