Temporada 1
30 episódios · 1965
A família de astronautas do Dr. John Robinson, acompanhada por um piloto e um robô, partiu em 1997 de uma Terra superpovoada na nave espacial Júpiter 2 para viajar a um planeta que orbita a estrela Alfa Centauri. A missão Júpiter 2 é sabotada pelo Dr. Zachary Smith (um agente de um governo estrangeiro não identificado), que entra na nave e reprograma o robô para destruir a nave e a tripulação. No entanto, Smith fica preso a bordo, e seu excesso de peso altera a trajetória de voo da nave, colocando-a diretamente no caminho de uma enorme tempestade de meteoros.
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No Place to Hide
1O Clandestino Relutante
No ano de 1997, a família Robinson parte para colonizar Alfa Centauri. Um espião estrangeiro, também conhecido como Dr. Smith, fica preso a bordo, tentando sabotar o projeto. A nave é desviada do curso e entra em uma tempestade de meteoros devido ao peso extra do Dr. Smith, que desequilibra os computadores de navegação. Smith tenta desesperadamente se salvar reanimando a tripulação. Resultado: a família Robinson se perde no espaço.
2O Abandonado
A Júpiter 2 é puxada para dentro de uma nave alienígena gigante, onde há criaturas avançadas semelhantes a bolhas. Enquanto John e Don procuram mapas e equipamentos, o Dr. Smith e Will procuram encrenca.
3Ilha no Céu
O Professor Robinson tenta explorar um planeta onde os Robinson planejam pousar. Seu sistema de propulsão para-jato falha devido à sabotagem do Dr. Smith. O Major West "pousa" a Júpiter II, apesar do Dr. Smith também ter sabotado o sistema de propulsão da Júpiter II, e a família e o Major West resgatam o Professor Robinson.
4Havia Gigantes na Terra
John descobre que o planeta em que estão se distanciará ainda mais do Sol. Na tentativa de sobreviver, os Robinsons fazem as malas e seguem para o sul. O Dr. Smith permanece no local de Júpiter 2 enquanto a família Robinson encontra um ciclope aterrorizante e uma antiga cidade deserta.
5O Mar Faminto
O Professor Robinson descobre que a órbita dos planetas trará imenso calor à nave espacial. Com esse conhecimento, os Robinson decolam na carruagem e seguem para o sul. No entanto, de volta à Júpiter 2, o Dr. Smith, que ficou para trás por acreditar que eles estavam mentindo, percebe que a órbita é estranha, trazendo imenso frio seguido de calor extremo. Ele envia o Robô para avisá-los, e eles então tentam viajar de volta à Júpiter 2. No entanto, em seu caminho, há um enorme mar interior que antes estava congelado. O imenso calor e frio carbonizam a vegetação. Eles sobrevivem ao calor e retornam à Júpiter 2, onde estão mais seguros.
6Bem Vindo Estranho
Jimmy Hapgood pousa no planeta e os Robinsons se tornam seus amigos. Depois de ajudá-lo a consertar sua nave espacial, os Robinsons tentam convencê-lo a levar Will e Penny de volta à Terra. O Dr. Smith tenta embarcar na nave e tomar o lugar deles.
7Meu Amigo, o Sr. Ninguém
Penny "imagina" uma nova companheira, uma força vital desencarnada que vive abaixo da superfície. O Dr. Smith acidentalmente fere Penny, fazendo com que a criatura desconte sua raiva em todo o planeta.
8Invasores da Quinta Dimensão
Alienígenas luminosos capturam o Dr. Smith e planejam substituir o computador queimado pelo cérebro dele. Smith negocia com eles e eles tentam usar o cérebro de Will.
9The Oasis
Dr. Smith eats some alien fruit which transforms him into a giant. Convinced it was the Robinsons trying to kill him, he plots to take them out.
10The Sky Is Falling
The Robinsons can not understand the language of a visiting family also on the planet. The aliens are called Taurons, and come to use the planet as a new colony. However Dr. Smith causes problems between the two camps when he panics and draws a gun on the new family. The Taurons end up not liking the planet and want to be alone, so they leave.
11Wish Upon a Star
The Robinson family banish Dr. 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 on the Robinsons good side he gives them the machine which plays on the family's greed.
12The Raft
Actually, Will and Dr. Smith went into an elongated orbit and landed right back on the planet, not too far from the Jupiter II.
13One of Our Dogs Is Missing
The women of Lost in Space are featured in their very own episode while the boys are out installing communications equipment. Smith is left in charge (boy is that a mistake) and he "cleans" their weapons, but cannot remember how to rebuild the weapons. This leaves the J2 crew defenseless. A creepy creature stalks the Robinson women however they think a small dog is to blame for raids on food and other mischief.
14Attack of the Monster Plants
Plants grow to huge proportions and can duplicate any item placed in them - but those items are made of plant material and are useless. John Robinson must use the biggest batch of plant killer he's ever mixed up to stop these things from engulfing the spaceship.
15Return from Outer Space
Lost in Space's only Christmas program. 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. Will escapes the family home he's in, and wanders around these clueless bunch of townspeople, but finds carbon tetrachoride — needed for the food processors on the Jupiter. Eventually he convinces another boy, Davey, to let him out, and let him return to the planet he came from. He returns to Priplanus with this bottle. Of course no one believes his adventures until he produces the bottle, plainly labeled as coming from Earth.
16The Keeper (1)
The Keeper, played by Michael Rennie, is a zoo keeper. He wants to take the children and add them to his collection. This episode is the only two-parter from the series.
17The Keeper (2)
The second part of the zookeeper played by Michael Rennie. Rennie turns in a memorable performance as The Keeper. His understated performance keeps dramatic tension where none would probably exist with a lessor actor.
18The Sky Pirate
The Robinsons meet a space traveler who turns out to be an Earth man, Alonzo P. Tucker, who was abducted from Punxsutawney, Pennsylvania, by aliens, in 1876. Tucker befriends Will by telling tall tales about being a pirate, but it turns out that he is only an ordinary man being pursued by aliens because he has stolen a mind reading device from them. Tucker returns the mind reading device to his alien pursuers, saving the Robinsons in the process.
19Ghost in Space
Dr. Smith holds a seance to contact his Uncle Thaddeus. Instead a spirit creature is contacted and creates havoc for the Robinsons. It is later discovered that the ""spirit creature"" is a physical creature, rendered invisible by the properties of the ""ionized gas"" in the bog from which it came.
20War of the Robots
Will and Dr. Smith stumble upon another robot. More capable than their own robot the alien robot works to gain the confidence of the Robinsons. At a critical point he plans to transport them to his home planet as slaves.
21The Magic Mirror
Penny and Judy stumble upon a mirror. They discover someone is on the otherside. Before they know it they are transported to the mirror universe which is occupied by only one person, a boy who is lonesome for companionship.
22The Challenge
An alien boy is sent to Priplanis to validate his prince status. Will is drawn into a battle to the death unbeknowest to his father. Once his real intentions are known John substitutes himself in the challenge and the Alien Ruler substitutes himself for his son.
23The Space Trader
After the entire Robinson food supply is wiped out in a freak storm a trader arrives to trade food for equipment the Robinson's possess. Dr. Smith trades the robot for food and hoards the supplies for himself. Later, after the Robinson's discover his transaction he gets the robot back but in exchange for his own self. The Trader then wants to take Smith as a slave, to another planet.
24His Majesty Smith
Dr. Smith is conscripted as the leader of a people from another world. Little does he know that the leaders of these people are routinely sacrificed and replaced with other expendible leaders. Smith is just one of a long line of sacrificed rulers.
25The Space Croppers
The Beverly Hillbillies move to Priplanis. One of the aliens turns into a werewolf at night. The leader is a articulent female which Smith tries to court so he may have transportation back to earth. Don falls for the sexy alien daughter.
26All That Glitters
In this retelling of "The Midis Touch", Dr. Smith gains the power to turn anything into platinum. 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, when it turns even his food to platinum, he is unable to remove the ring, which is now a solid bar. He leaves the camp as he fears turning everything into platinum, and he will eventually starve to death. A galactic lawman is on the trail, looking for the stolen device to use for his own nefarious purposes.
27The Lost Civilization
The Robinson men discover an underground civilization while exploring the planet. Will wakes a sleeping princess who wants him to remain and rule with her.
28A Change of Space
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 could happen to him, the increase of intellect, boards the spaceship. His trip, however, ends in his rapid aging and subsequent impending death. To make matters worse, the owner of the spaceship has returned to take the vehicle back, stranding Will and Dr. Smith in their altered state.
29Follow the Leader
John Robinson is possessed by an alien spirit. The alien forces the family to prepare to return to the spirit's home world, even if it requires he sacrifice Will to keep his secret from the rest of the family.