






















































John Robinson is possessed by an alien creature. The alien forces the family to prepare to return to the creature's home world, even if it requires he sacrifice Will to keep his secret from the rest of the family.

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 and enjoys. However, it also turns his food to platinum, which is always in short supply.
moreless



An alien boy is sent to Priplanis to validate his prince status. Will is drawn into a battle to the death, unbeknown to his father. Once his real intentions are known, John substitutes himself in the challenge and the alien ruler substitutes himself for his son.

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 and Dr. Smith stumble upon another robot on the planet that is even more capable than their own. The alien robot works to gain the confidence of the Robinson family because, at a critical point, he plans to transport them to his home planet as slaves.

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.

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.

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.


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.


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.

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.


Astronaut Jimmy Hapgood makes an emergency landing on the planet and the Robinsons befriend him. After Jimmy fixes his spaceship, the Robinsons try and convince him to take Will and Penny back to Earth with him. However, Dr. Smith tries to get aboard the ship to get back to Earth instead.
moreless





CBS Entertainment | About TV.com | About CBS Interactive | Jobs | Advertise
© 2012 CBS Interactive Inc. All rights reserved. | Privacy Policy | Ad Choice | Terms of Use