The Earthlings come to the aid of a giant deaf boy and his poverty-stricken family.
The Giants have invented a detector that can home in on a unique Earth-based metal. Dan puts the entire group at risk due to the surgical pin in his leg, and they mus turn to a former ally, Dr. Brule, for help in removing it.moreless
The Spindrift crew finds a paranoid survivor from Earth...but his suspicions endanger everyone.
The Spindrift crashes on the Land of the Giants and its crew and passengers quickly find themselves in a struggle for survival.
The guys land on an island in the South Pacific at the tail end of WW2. Two Japanese soldiers have been left behind: the deranged Lt. Nakamura, who hates Americans, and the loyal sergeant, Itsugi. Nakamura soon fixates on the travelers and forces them into a series of sadistic games. When the Project: Tic-Toc staff call in a consultant to try and get a fix on their friends' location, the consultant turns out to be the lieutenant's father.moreless
Tony and Doug land in the Japanese Consulate in Honolulu on December 6, 1941, and see three men burning files. They talk their way out and Tony goes to find his father, who disappeared during the upcoming sneak attack. However, the Japanese suspect that they're American spies and set out to kill them before they can find anyone who will believe them.moreless
Due to Dr. Smith's actions, the crew of the Jupiter II has had to land their ship on a alien planet which is run by cyborgs. The crew must rescue their crippled robot and then try to break free from the captors, even though the cyborgs promise them power and luxury for the rest of their lifes.moreless
John Robinson becomes possessed by an alien creature who forces the family to prepare to return to the creature's home world, even if it requires that he sacrifice Will to keep his secret from the rest of the family.moreless
The Intergalactic Delivery Service comes to Priplanus. Once again Dr. Smith seeks transportation and has Will "test drive" the spaceship. Will returns much smarter than when he left. Smith, realizing the same increase of intellect could happen to him, boards the spaceship. His trip, however, ends in his rapid aging and subsequent impending death.moreless
Penny is given a gift by a thief on the run, who tells her to protect it for him. She and Dr. Smith discover that it leads them to a ring which, when worn, allows the person to turn anything to platinum, which Dr. Smith does. Unfortunately, the ring also turns their food into the metal too and food is always in short supply.moreless
An alien boy is sent to Priplanis to validate his prince status. Will Robinson is drawn into a battle to the death, unbeknown to his father. Once his real intentions are known, John Robinson substitutes himself in the challenge and the alien ruler substitutes himself for his son.moreless
Penny and Judy stumble upon a mirror on the planet. But it's not an ordinary mirror as it seems that there is someone on the "other side". Before they know it they are transported to the mirror universe that is occupied by only one person, a boy who is lonesome for companionship.moreless
Will Robinson and Dr. Smith stumble upon another robot on the planet that is even more capable than their own. The alien robot sets out to gain the confidence of the Robinson family because, at a future critical point, he plans to transport them to his home planet as slaves.moreless
Dr. Smith holds a seance to contact his Uncle Thaddeus. Instead a "spirit" creature is contacted and creates havoc for the Robinsons.
The Robinsons are given the option to turn Penny and Will over to The Keeper or face certain death.
A zoo keeper who travels the universe wants to take Will and Penny and add them to his vast collection of celestial animals.
Will uses an alien transporter to send himself back to Earth. However, many people believe the Robinson family to be dead after hearing the ship went off course. Nobody on Earth believes him, and they lock him up with the intention of sending him to a boys' home.moreless
The Robinson family discover a large alien plant that can duplicate whatever it is fed. Dr. Smith steals the ship's remaining fuel with the intention of feeding it to the alien plant, hoping to double the fuel supply.moreless
While the men are away, an alien creature stalks the Robinson women from the shadows. The girls just think it's a small dog that is to blame for raids on food and other mischief.moreless
The Robinson family banishes Smith from the Jupiter 2. He takes refuge in an abandoned spaceship where he finds a machine that can materialize anything. In an attempt to get back into the Robinson's good standing, he gives them the machine, which plays on the family's greed.moreless
A visiting family of aliens, called Taurons, have decided to use the Robinsons' planet as a new colony. Although the Robinsons cannot understand the language of a visiting family they welcome them to live in peace and harmony. However, as usual, Dr. Smith causes problems when he panics and draws a gun on the alien family.moreless
Dr. Smith eats some alien fruit, which turns him into a giant. He becomes convinced that giving him the fruit was the Robinsons trying to kill him. So he plots to take them out.moreless
Luminous aliens capture Dr. Smith with the plan to replace their burnt out computer with his brain. Smith bargains with them, and they decide to use Will's brain instead.