Trapped on a spaceship, Jeff must prove to the alien emperor that he's truly in love with Hayley in order to return to Earth.
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 now die!
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 recruit Judy for his Miss Galaxy Beauty Pageant.
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 manages to upset him further.
After searching for the long-lost Princess Alpha of Beta-Three, Captain Kraspo believes Penny may actually be the princess.
The never-helpful Dr. Smith accidentally launches the Space Pod into space while the lower half of the Robot is on board!
John Robinson is accidentally transported to an anti-matter world, where he is held captive by an evil replica of Don.
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 the rest of her family.
In order to make repairs to the Jupiter 2, the Robinsons land on a planet where the Robot discovers a female robot.
As if Dr. Smith isn’t odd enough to begin with, an unusual creature takes over his personality.
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