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The Best Episodes of Lost in Space Season 1

Every episode of Lost in Space Season 1 ranked from best to worst. Discover the Best Episodes of Lost in Space Season 1!

Binge this in 21h 15m•Peaking at 8.3/10

The space family Robinson is sent on a five-year mission to find a new planet to colonise. The voyage is sabotaged time and again by an inept stowaway, Dr. Zachary Smith. The family's spaceship, Jupiter

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Episode Rankings

  1. #1 Fan Favorite
    Lost in Space Season 1 Episode 15 - Return from Outer Space
    8.3/10(438 votes)

    S1:E15

    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.

    Director:Nathan Juran
    Writer:Peter Packer

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  2. Lost in Space Season 1 Episode 16 - The Keeper (1)
    8.2/10(349 votes)

    S1:E16

    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.

    Directors:Harry Harris, Sobey Martin
    Writer:Barney Slater

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  3. Lost in Space Season 1 Episode 29 - Follow the Leader
    8.2/10(321 votes)

    S1:E29

    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.

    Director:Don Richardson
    Writer:Barney Slater

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  4. Lost in Space Season 1 Episode 5 - The Hungry Sea
    8.0/10(374 votes)

    S1:E5

    Professor Robinson discovers that the planets orbit will bring immense heat on the spaceship. With that knowledge the Robinson's take off in the chariot and head south. However back at the Jupiter two, Dr Smith who stayed behind because he believed them to be lying, realises that the orbit is strange, bringing immense cold followed by extreme heat. He sends the Robot to tell them, and they then attempt to travel back to the Jupiter 2. However in their way is a huge in-land sea which previously had been frozen solid. The immense heat and cold make the vegetation charred. They survive the heat and return to the Jupiter Two where they are most safe.

    Director:Sobey Martin
    Writer:Unknown

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  5. Lost in Space Season 1 Episode 20 - War of the Robots
    8.0/10(342 votes)

    S1:E20

    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.

    Director:Sobey Martin
    Writer:Barney Slater

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  6. Lost in Space Season 1 Episode 1 - The Reluctant Stowaway
    7.9/10(521 votes)

    S1:E1

    In the year 1997 the Robinson family take off to colonize Alpha Centauri. A spy from a foreign country AKA Dr. Smith becomes trapped aboard trying to sabotage the project. The ship is whisked off course and into a meteor storm due to Dr. Smith's extra weight upsetting the navigational computers. Smith desperately tries to save himself by reviving the crew. The result: the Robinson family becomes lost in space.

    Director:Anton Leader
    Writer:Shimon Wincelberg

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  7. Lost in Space Season 1 Episode 7 - My Friend, Mr. Nobody
    7.9/10(417 votes)

    S1:E7

    Penny "imagines" a new companion, which is a disembodied life force living below the surface. Dr. Smith accidentally injures Penny, leading to the creature taking his anger out on the entire planet.

    Director:Paul Stanley
    Writer:Jackson Gillis

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  8. Lost in Space Season 1 Episode 11 - Wish Upon a Star
    7.9/10(346 votes)

    S1:E11

    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.

    Director:Sutton Roley
    Writer:Barney Slater

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  9. Lost in Space Season 1 Episode 17 - The Keeper (2)
    7.9/10(319 votes)

    S1:E17

    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.

    Director:Harry Harris
    Writer:Barney Slater

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  10. Lost in Space Season 1 Episode 8 - Invaders from the Fifth Dimension
    7.8/10(353 votes)

    S1:E8

    Luminous aliens capture Dr. Smith and plan to replace their burnt out computer with his brain. Smith bargains with them and they attempt to use Will's brain instead.

    Director:Leonard Horn
    Writer:Shimon Wincelberg

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  11. Lost in Space Season 1 Episode 4 - There Were Giants in the Earth
    7.7/10(381 votes)

    S1:E4

    John discovers that the planet they are on will travel further from the sun.In an attempt to survive the Robinsons pack up and head south. Dr Smith stays at the Jupiter 2 site while the Robinson family encounter a terrifying cyclops and an ancient deserted city.

    Director:Leo Penn
    Writer:Unknown

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  12. Lost in Space Season 1 Episode 22 - The Challenge
    7.7/10(320 votes)

    S1:E22

    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.

    Director:Don Richardson
    Writer:Barney Slater

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  13. Lost in Space Season 1 Episode 3 - Island in the Sky
    7.6/10(378 votes)

    S1:E3

    Professor Robinson attempts to explore a planet that the Robinson's are planning to land on. His para-jet propulsion system fails due to sabotage by Dr. Smith. Major West "lands" the Jupiter II, in spite of the fact that Dr. Smith has also sabotaged the propulsion system of the Jupiter II, and the family and Major West rescue Professor Robinson.

    Director:Anton Leader
    Writer:Unknown

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  14. Lost in Space Season 1 Episode 21 - The Magic Mirror
    7.4/10(343 votes)

    S1:E21

    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.

    Director:Nathan Juran
    Writer:Jackson Gillis

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  15. Lost in Space Season 1 Episode 26 - All That Glitters
    7.4/10(298 votes)

    S1:E26

    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.

    Director:Harry Harris
    Writer:Barney Slater

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  16. Lost in Space Season 1 Episode 10 - The Sky Is Falling
    7.3/10(346 votes)

    S1:E10

    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.

    Director:Sutton Roley
    Writer:Herman Groves

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  17. Lost in Space Season 1 Episode 24 - His Majesty Smith
    7.3/10(284 votes)

    S1:E24

    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.

    Director:Harry Harris
    Writer:Carey Wilber

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  18. Lost in Space Season 1 Episode 28 - A Change of Space
    7.3/10(275 votes)

    S1:E28

    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.

    Director:Sobey Martin
    Writer:Peter Packer

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  19. Lost in Space Season 1 Episode 2 - The Derelict
    7.2/10(412 votes)

    S1:E2

    The Jupiter 2 is pulled into a giant alien spaceship where there are advanced bubble-like creatures. While John and Don look for maps and equipment Dr Smith and Will look for trouble.

    Director:Alexander Singer
    Writer:Unknown

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  20. Lost in Space Season 1 Episode 14 - Attack of the Monster Plants
    7.1/10(311 votes)

    S1:E14

    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.

    Director:Jus Addiss
    Writers:Allan Balter, William Read Woodfield

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  21. Lost in Space Season 1 Episode 6 - Welcome Stranger
    7.0/10(354 votes)

    S1:E6

    Jimmy Hapgood lands on the planet and the Robinsons befriend him. After helping him fix his spaceship the Robinsons try to convince him to take Will and Penny back to Earth with him. Dr. Smith tries to get aboard the ship instead and take their place.

    Director:Alvin Ganzer
    Writer:Peter Packer

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  22. Lost in Space Season 1 Episode 27 - The Lost Civilization
    7.0/10(304 votes)

    S1:E27

    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.

    Director:Don Richardson
    Writer:William Welch

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  23. Lost in Space Season 1 Episode 12 - The Raft
    6.9/10(301 votes)

    S1:E12

    Actually, Will and Dr. Smith went into an elongated orbit and landed right back on the planet, not too far from the Jupiter II.

    Director:Sobey Martin
    Writer:Peter Packer

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  24. Lost in Space Season 1 Episode 19 - Ghost in Space
    6.9/10(296 votes)

    S1:E19

    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.

    Director:Don Richardson
    Writer:Peter Packer

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  25. Lost in Space Season 1 Episode 23 - The Space Trader
    6.8/10(277 votes)

    S1:E23

    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.

    Director:Nathan Juran
    Writer:Barney Slater

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Season 1 Ratings Summary

"Return from Outer Space" is the best rated episode of "Lost in Space" season 1. It scored 8.3/10 based on 438 votes. Directed by Nathan Juran and written by Peter Packer, it aired on 12/29/1965. This episode is rated 0.1 points higher than the second-best, "The Keeper (1)".