By December 2001, after a delayed revival from suspended animation, the family has settled in over a six-month period and made the planet their home, but a severe winter is coming and they must journey south.
Traveling in their all-terrain "chariot," the family encounters fearsome cyclopean monsters, survives a stormy sea, and explores the cave of an ancient civilization.
Guest stars: Don Forbes (TV Commentator), Ford Rainey (The President), Lamar Lundy (The Giant) No Place to Hide was colorized and appears as an extra on the Netflix Lost in Space Season 1 June 4, 2019 Blu-ray release.
Meanwhile, the Professor and Maureen make a critical decision – knowing Hapgood's capsule, Traveling Man, can carry two more passengers, they ask him to take Will and Penny off the dangerous planet and back with him to Earth.
When the two boys do not return to their respective camps, the aliens and the Robinsons begin to suspect each other of foul play which could lead to a potentially deadly confrontation if the children are not found.
Will arrives in a small Vermont town and he tries to contact Alpha Control, but the locals who help him don't buy his stories of being from the Jupiter 2 mission.
While the Professor and Major West investigate a landed alien ship, Will and Dr. Smith are captured by a pirate named Tucker and his mechanical parrot Nick.
The trader shows them incredible wares and tasty food from around the galaxy, but the greedy businessman's prices are too high for the Robinsons who require every vital piece of equipment they have.
Guest stars: Kym Karath (Princess), Royal Dano (Major Domo) While exploring a cave containing ancient artifacts, the Professor finds a tomb and encounters a ghostly entity named Canto (voiced by Gregory Morton) who slowly possesses his mind.
All episodes in Seasons 2 and 3 filmed in color Dr. Smith and Will encounter an intergalactic prospector named Nerim who is mining for cosmonium, a substance he claims is the most valuable material in the universe and that it contains the force of life.
Guest star: Strother Martin (Nerim) Claiming he has found the way to Earth, Dr. Smith tampers with the navigation controls and inadvertently dumps all the Jupiter 2's reserve fuel supply.
Meanwhile, Smith, who has changed the ship's course back to Earth again by coopting Penny to do it for him, begins to see a beautiful, green-skinned woman floating outside the viewports who sings his name, but no one believes his wild story.
After finding the Robot, Smith and Will encounter a hostile, reclusive hermit named Tiabo, who pretends to be part of an alien army in hopes of frightening the Robinsons away.
The Professor refuses, but after Dr. Smith learns a fighter could stand to earn riches beyond imagination if he wins, he tries to enter the games himself – but only after cutting a deal to face what he believes is the weakest opponent.
Penny is put to work tending a furnace, while the thief recruits Will to help him find his lost love – a princess he believes is trapped somewhere back on the Robinsons' planet.
Sesmar tests the Robinsons' feelings with a special camera he gives to Dr. Smith, and then tricks the family into entering his lab, where he drains the emotions from their minds and leaves them irritable and lazy people.
Major West, whose traits were rejected by Sesmar, has to team up with his nemesis Dr. Smith to stop the mad scientist and return the Robinsons back to normal.
Smith foolishly gives the man the weapons, and the alien reveals its true form – a twisted-faced monster who really plans to destroy the Robinsons once he finishes off his enemy.
There, Smith learns Zalto has his own spaceship and the wizard plans to promote himself by using the craft to destroy an asteroid with the resulting explosion spelling his name among the stars.
Will tries to get a message through to his parents at a relay station, but when he returns to the ship, he finds Dr. Smith, Major West, Penny and Judy acting strangely and the Robot damaged.
Guest stars: Sean McClory (Hamish) While Dr. Smith, Penny and Will conduct a play, a sickly alien named Arcon appears and begs for help.
Guest stars: John Carradine (Arcon), Jim Mills (Saticon #1) A comet threatens to impact the Robinson's planet and the family is forced to make a hasty escape in the Jupiter 2.
Meanwhile, Dr. Smith believes he can make a fortune advancing the technology of the backward era and, disguised as a fire chief, he tries to lead a vigilante force to take the Robinsons prisoner.
While the Jupiter 2 is threatened by lava flows from an erupting volcano, Major West and a reluctant Dr. Smith are on a mission in the Chariot to cap the mountain with a nuclear explosive.
Guest star: Tommy Farrell (Cyborg) Moments before takeoff, Penny encounters an elfin boy named J-5 who claims to be the last survivor of a doomed colony, and the Robinsons take him with them when they leave.
Guest stars: Leonard Stone (Farnum), Gary Tigerman (Oggo), Ronald Weber (Mort) A group of alien bank robbers, disguised as humans, brainwash the Celestial Department Store manager Mr. Zumdish into thinking he is a galactic tour guide.
Guest stars: Michael Conrad (Creech), Tol Avery (Warden), Charles Horvath (Guard #1) The space traveling showman Farnum B. returns seeking contestants for a Miss Galaxy pageant and sets his sights on Judy when his mysterious sponsor demands she enter.
Guest stars: Leonard Stone (Farnum), Dee Hartford (Nancy Pi Squared), Miriam Schillar (Miss Teutonium) The Jupiter 2 passes through a radiation storm and Dr. Smith's alien plant mutates, growing into an intelligent monster.
With Dr. Smith mutating into a stalk of celery, and Penny into a flower bed, it's up to Will and Judy to find them all, and the Professor and Don to save the day by sabotaging the planet's weather-control system.
Guest stars: Stanley Adams (Tybo), James Millhollin (Willoughby the Llama), Jerry Traylor (Plant) Notes: A fire breaks out aboard the Jupiter 2 and the Robinsons must land on a nearby planet to make repairs.