While on a junkyard planet, Dr. Smith realizes the crew’s food supply is dwindling.

Dr. Smith picks a flower and is immediately accused of murder by a giant talking carrot, who says that he must...

A plant that thinks Dr. Smith is its mother attaches itself to the Jupiter 2.

When Farnum B., Showman of the Cosmos, crash-lands on the Robinson’s current planet, he immediately tries to...

An alien prison escapee manages to exchange his prison jacket for Dr. Smith’s parka.

Once welcomed to do so, the Jupiter 2 arrives on a planet inside the Alpha Centauri solar system.

The Robinsons accidentally interrupt the voyage of a time traveler, Chronos, and then, as always, Dr. Smith...

After searching for the long-lost Princess Alpha of Beta-Three, Captain Kraspo believes Penny may actually be...

The never-helpful Dr. Smith accidentally launches the Space Pod into space while the lower half of the Robot...

John Robinson is accidentally transported to an anti-matter world, where he is held captive by an evil replica...

The Robinsons take in a princess who is being sought by a bounty hunter.

Two clever alien bank robbers transform themselves into Earthlings.

Penny is captured and taken to an intergalactic zoo, where she is expected to be part of a show, along with...

In order to make repairs to the Jupiter 2, the Robinsons land on a planet where the Robot discovers a female...

As if Dr. Smith isn’t odd enough to begin with, an unusual creature takes over his personality.

A group of space hippies seek to destroy the Robinsons’ planet!

While in the Space Pod, the bumbling Dr. Smith accidentally launches himself, Will and the Robot to a nearby...

The Robinsons give refuge aboard the Jupiter 2 to a lost alien boy named J-5 and agree to take him home.

While exploring a cave with the Robot, Smith hits buttons on a control panel he discovers, thereby activating...

After trying to seal a menacing volcano so that the Jupiter 2 can take off, Don West and Dr. Smith are...

After he and the Robot are attacked by a hairy mutant, John Robinson whips out his laser pistol and destroys...

Another spaceship sends out an SOS because their leader, a computer, needs brain surgery.

Caught in a “time warp,” the Jupiter 2 crew discover not only that they can now return to Earth, but it’s...

Trying to escape from a flaming comet, the Robinsons come upon a spaceship filled with frozen alien criminals.

Penny becomes embroiled in a war between two alien factions when she takes possession of the powerful magic...

Driven into a cave by an electrical storm, Will stumbles into a space-warp that takes him back in time through...

A band of tiny robots -- who worship the Robinson's Robot as their leader -- surrounds Dr. Smith and forces...

A scientist makes android copies of Smith, Don and the girls, then orders Will to teach them how to behave.

The Robot grows to enormous proportions when his ionic processes are reversed, leading Dr. Smith and Will on a...

An ear-shattering noise leads the Robinsons to a showdown with a statuesque Amazon warrior named Niolani, who...

In another foiled get-rich-quick scheme, Smith becomes involved with a ruby-devouring android named Idak. But...

The discovery of a talking head leads Will, Penny, Dr. Smith and the Robot on a strange search for a lost...

Smith's fascination with a computer in a cave endangers the Robinsons' escape plan to Alpha Centauri.

Dr. Smith takes a job as an alien magician's assistant, in hopes of returning to Earth. But the plan...

Dr. Smith and Will have a mythological adventure as they take on the ancient God Thor and travel on a winged...

Dr. Smith and the Robot discover an abandoned alien spacecraft which Smith hopes might provide a getaway to...

Will and Smith enter a strange vending machine and wind up in a toy factory run by an eccentric.

Penny meets a scaly female beast chased by a bumbling knight (Hans Conried).

The green alien who once hypnotized Smith returns and shows him bits of the future.

Penny befriends a frog-like alien involved in a war with a leader of another civilization.

A scientist drains the Robinsons' human qualities to pass on to an android.

Aliens plan to use the Robot as a blueprint for a device to control machinery.

A magical lyre sends Dr. Smith to a Hades-like prison filled with smoke and fire. Meanwhile, a...

Chaos ensues on a Western-style planet when Dr. Smith is mistaken for a notorious intergalactic gunslinger...

Dr. Smith's cousin Jeremiah drops in by parachute and attempts to rob Smith of their aunt's inheritance--...

With a magical ruby ring, and a little help from Penny and Dr. Smith, Will Robinson helps a futuristic Arab...

John Robinson is coaxed into an intergalactic wrestling match by a giant alien fight promoter -- only to learn...

A female android, capable of human emotions, joins the Jupiter 2 -- only to be rejected by Smith and the Robot...

A galactic tribunal tries the Robinson party for space crimes.

The ringmaster (James Westerfield) of a space circus asks Will and Smith to join his troupe.

After the ship makes a forced landing, Smith meets an alien (Wally Cox) and guzzles an explosive liquid.

The Jupiter 2 lands on a planet Dr. Smith mistakenly believes is Earth. When Smith is lured out of the ship...

John Robinson saves the day when Dr. Smith inadvertently sets the Jupiter 2 on a direct course towards the sun...

Smith's dealings with a prospector (Strother Martin) threaten to maroon the ship on a disintegrating planet.

The mind and soul of Professor John Robinson is overtaken by an unseen alien spirit, forcing Robinson to turn...

Will comes upon an alien spaceship that takes him to the Sixth dimension, transforming him into a boy genius....

John, Don and Will discover an underground world of soldiers frozen in suspended animation, waiting for their...

Dr. Smith discovers the dark side of greed when he steals a magic disc that turns everything he touches - even...

An oddball family of alien hillbillies ensnares the Robinsons. Their daughter tries to romance Don while...

Dr. Smith lobbies to become king of a luxurious planet named Andronica, only to discover he's to be used as a...

Dr. Smith makes a hard bargain when his dealings with a space trader go awry, and he finds himself in an...

A tough little alien boy and his father attempt to prove their superiority to humans by challenging John and...

Frustrated with impending adolescence, Penny falls into a mirror and enters a strange new dimension. There...

The family's robot is seemingly replaced when Will repairs a robotoid from an advanced civilization - until...

A strange, ghost-like presence appears after an explosion in a bog awakens it. Dr. Smith conducts a séance,...

The Robinsons find new hope when they meet a marooned pirate with an interstellar vehicle capable of returning...

Chaos reigns as the Keeper's creatures, let loose by the robot and Dr. Smith, overrun the planet. The Keeper...

The family comes upon an evil alien zookeeper, whose trance-like powers can entice exotic animals-and young...

Will discovers a matter-transfer portal that returns him to Earth, but once there, the residents of a small...

The family is threatened by a giant cyclamen plant that can create realistic duplicates of anything it...

A friendly little dog survives the crash of a space capsule and leads Professor Robinson and Don West to Judy,...

Will comes up with an idea for a two-man ship that can travel to Earth. But when Dr. Smith hijacks the ship, a...

When Dr. Smith and Will discover a magic wish-granting machine, the family becomes intoxicated with greed. But...

The Robinsons confront their mistrust of an alien family that has beamed in from space. Unable to understand...

The Robinsons' water crisis deepens when Dr. Smith uses their only water supply for a shower. But a strange...

Glowing humanoids invade the Robinsons' colony in search of a brain to navigate their ship. Their plan is...

Penny befriends a lonely echo voice she calls "Mr. Nobody." But when the girl appears to be injured, the...

The Robinsons try to persuade a long-stranded astronaut, James Hapgood, to take Will and Penny back to Earth. ...

Following a quick escape from an ancient city, the Robinsons must flee the heat of an unknown planet's sun. ...

The Robinsons set up camp on a planet populated by strangely evolving life forms. As the family moves their...

The family crash-lands on an unknown planet in an attempt to rescue Professor Robinson. Maureen and the others...

Following a tense effort to rescue John Robinson from deep space, the Jupiter 2 is drawn inside a massive...