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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!

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 II, also carries a friendly robot who endures an endless stream of abuse from Dr. Smith, but is a trusted companion of young Will Robinson

Genres:Sci-Fi & FantasyComedy
Network:CBS

Season 1 Ratings Summary

The best episode of "Lost in Space" season 1 is "The Reluctant Stowaway", rated 7.8/10 from 443 user votes. It was directed by Anton Leader and written by Shimon Wincelberg. "The Reluctant Stowaway" aired on 9/15/1965 and is rated 0.8 point(s) higher than the second highest rated, "The Derelict".

  • The Reluctant Stowaway
    7.8/10 443 votes

    #1 - The Reluctant Stowaway

    Season 1 Episode 1 - Aired 9/15/1965

    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

  • The Derelict
    7.0/10 351 votes

    #2 - The Derelict

    Season 1 Episode 2 - Aired 9/22/1965

    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: N/A

  • Island in the Sky
    7.5/10 327 votes

    #3 - Island in the Sky

    Season 1 Episode 3 - Aired 9/29/1965

    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: N/A

  • There Were Giants in the Earth
    7.6/10 331 votes

    #4 - There Were Giants in the Earth

    Season 1 Episode 4 - Aired 10/6/1965

    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: N/A

  • The Hungry Sea
    7.8/10 327 votes

    #5 - The Hungry Sea

    Season 1 Episode 5 - Aired 10/13/1965

    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: N/A

  • Welcome Stranger
    6.9/10 297 votes

    #6 - Welcome Stranger

    Season 1 Episode 6 - Aired 10/20/1965

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

    Director: Alvin Ganzer

    Writer: Peter Packer

  • My Friend, Mr. Nobody
    7.8/10 359 votes

    #7 - My Friend, Mr. Nobody

    Season 1 Episode 7 - Aired 10/27/1965

    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

  • Invaders from the Fifth Dimension
    7.7/10 304 votes

    #8 - Invaders from the Fifth Dimension

    Season 1 Episode 8 - Aired 11/3/1965

    Luminous aliens capture Dr Smith and plan to replace thir burnt out computer with his brain.Smith bargains with them and they attempt to use Wills brain instead.

    Director: Leonard Horn

    Writer: Shimon Wincelberg

  • The Oasis
    6.6/10 273 votes

    #9 - The Oasis

    Season 1 Episode 9 - Aired 11/10/1965

    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.

    Director: Sutton Roley

    Writer: Peter Packer

  • The Sky Is Falling
    7.3/10 290 votes

    #10 - The Sky Is Falling

    Season 1 Episode 10 - Aired 11/17/1965

    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

  • Wish Upon a Star
    7.9/10 289 votes

    #11 - Wish Upon a Star

    Season 1 Episode 11 - Aired 11/24/1965

    The Robinson family banish Smith from the Jupiter 2.He takes refuge in an abandoned spaceship where he finds a machine that can materilise anything.In an attempt to get back into the Robinsons good books he gives them the machine which plays on the familys greed.

    Director: Sutton Roley

    Writer: Barney Slater

  • The Raft
    6.8/10 248 votes

    #12 - The Raft

    Season 1 Episode 12 - Aired 12/1/1965

    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

  • One of Our Dogs Is Missing
    6.6/10 252 votes

    #13 - One of Our Dogs Is Missing

    Season 1 Episode 13 - Aired 12/8/1965

    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.

    Director: Sutton Roley

    Writer: William Welch

  • Attack of the Monster Plants
    6.9/10 258 votes

    #14 - Attack of the Monster Plants

    Season 1 Episode 14 - Aired 12/15/1965

    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

    Writer: Allan Balter, William Read Woodfield

  • Return from Outer Space
    8.2/10 374 votes

    #15 - Return from Outer Space

    Season 1 Episode 15 - Aired 12/29/1965

    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 H. Juran

    Writer: Peter Packer

  • The Keeper (1)
    8.1/10 297 votes

    #16 - The Keeper (1)

    Season 1 Episode 16 - Aired 1/12/1966

    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.

    Director: Harry Harris, Sobey Martin

    Writer: Barney Slater

  • The Keeper (2)
    7.8/10 271 votes

    #17 - The Keeper (2)

    Season 1 Episode 17 - Aired 1/19/1966

    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

  • The Sky Pirate
    6.4/10 259 votes

    #18 - The Sky Pirate

    Season 1 Episode 18 - Aired 1/26/1966

    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.

    Director: Sobey Martin

    Writer: Carey Wilber

  • Ghost in Space
    6.8/10 240 votes

    #19 - Ghost in Space

    Season 1 Episode 19 - Aired 2/2/1966

    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

  • War of the Robots
    7.9/10 292 votes

    #20 - War of the Robots

    Season 1 Episode 20 - Aired 2/9/1966

    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

  • The Magic Mirror
    7.3/10 292 votes

    #21 - The Magic Mirror

    Season 1 Episode 21 - Aired 2/16/1966

    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 H. Juran

    Writer: Jackson Gillis

  • The Challenge
    7.6/10 276 votes

    #22 - The Challenge

    Season 1 Episode 22 - Aired 3/2/1966

    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

  • The Space Trader
    6.7/10 230 votes

    #23 - The Space Trader

    Season 1 Episode 23 - Aired 3/9/1966

    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 H. Juran

    Writer: Barney Slater

  • His Majesty Smith
    7.2/10 237 votes

    #24 - His Majesty Smith

    Season 1 Episode 24 - Aired 3/16/1966

    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

  • The Space Croppers
    6.4/10 260 votes

    #25 - The Space Croppers

    Season 1 Episode 25 - Aired 3/30/1966

    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.

    Director: Sobey Martin

    Writer: Peter Packer