The BEST episodes of Lost in Space season 1

Every episode of Lost in Space season 1, ranked from best to worst by thousands of votes from fans of the show. The best episodes of Lost in Space season 1!

A space colony family struggles to survive when a spy/accidental stowaway throws their ship hopelessly off course.

Last Updated: 3/15/2024Network: CBSStatus: Ended
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Follow the Leader
star
8.25
44 votes

#1 - Follow the Leader

Season 1 - Episode 29 - Aired 4/27/1966

John falls into a cave containing a centuries-old mummy, whose spirit possesses John’s body.

Directors: Don Richardson
Watch Now:AmazonApple TV
Wish Upon a Star
star
8.03
66 votes

#2 - Wish Upon a Star

Season 1 - Episode 11 - Aired 11/24/1965

Will and Dr. Smith discover a device that transforms wishes into realities.

Directors: Sutton Roley
Watch Now:AmazonApple TV
War of the Robots
star
8.02
52 votes

#3 - War of the Robots

Season 1 - Episode 20 - Aired 2/9/1966

Will finds a rusted, more capable robot, but the Robinsons’ own robot warns him against rebuilding the device.

Directors: Sobey Martin
Watch Now:AmazonApple TV
The Challenge
star
7.90
39 votes

#4 - The Challenge

Season 1 - Episode 22 - Aired 3/2/1966

The Robinsons encounter a militant boy who is determined to prove his superiority over the earthlings.

Directors: Don Richardson
Watch Now:AmazonApple TV
Return from Outer Space
star
7.80
86 votes

#5 - Return from Outer Space

Season 1 - Episode 15 - Aired 12/29/1965

Will disobeys John’s orders to stay away from the matter-transfer unit and is transported back to Earth.

Directors: Nathan Juran
Writer: Peter Packer
Watch Now:AmazonApple TV
The Keeper (1)
star
7.80
54 votes

#6 - The Keeper (1)

Season 1 - Episode 16 - Aired 1/12/1966

The castaways’ planet is visited by a being traveling the universe to collect creatures—two of every kind.

Directors: Harry Harris
Watch Now:AmazonApple TV
The Sky is Falling
star
7.78
83 votes

#7 - The Sky is Falling

Season 1 - Episode 10 - Aired 11/17/1965

The Robinsons encounter a family of crablike visitors who are far from friendly.

Directors: Sutton Roley
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My Friend, Mr. Nobody
star
7.74
88 votes

#8 - My Friend, Mr. Nobody

Season 1 - Episode 7 - Aired 10/27/1965

Penny discovers a deep cave inhabited by an invisible but seemingly friendly voice.

Directors: Paul Stanley
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Invaders from the Fifth Dimension
star
7.71
87 votes

#9 - Invaders from the Fifth Dimension

Season 1 - Episode 8 - Aired 11/3/1965

The travelers are menaced by glowing creatures who are looking for a humanoid brain.

Directors: Leonard J. Horn
Watch Now:AmazonApple TV
The Keeper (2)
star
7.68
44 votes

#10 - The Keeper (2)

Season 1 - Episode 17 - Aired 1/19/1966

The Robinsons must turn Penny and Will over or face death.

Directors: Harry Harris
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The Hungry Sea
star
7.67
108 votes

#11 - The Hungry Sea

Season 1 - Episode 5 - Aired 10/13/1965

An earthquake threatens to seal the cave where Don, Judy, Will, and Penny are trapped.

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The Magic Mirror
star
7.62
39 votes

#12 - The Magic Mirror

Season 1 - Episode 21 - Aired 2/16/1966

Penny discovers an extraordinary mirror which reflects a world that does not exist.

Directors: Nathan Juran
Watch Now:AmazonApple TV
Ghost in Space
star
7.59
41 votes

#13 - Ghost in Space

Season 1 - Episode 19 - Aired 2/2/1966

Smith sets off an explosion in a bog, arousing an invisible, indestructible, and irresistible, creature.

Directors: Sobey Martin
Watch Now:AmazonApple TV
The Oasis
star
7.58
91 votes

#14 - The Oasis

Season 1 - Episode 9 - Aired 11/10/1965

The Robinsons face dangers on strange terrain, where water is running low and the heat is getting more intense.

Writer: Peter Packer
Watch Now:AmazonApple TV
The Sky Pirate
star
7.49
35 votes

#15 - The Sky Pirate

Season 1 - Episode 18 - Aired 1/26/1966

The Robinsons meet a space traveling Earth man, Alonzo P. Tucker, who was abducted by aliens in 1876.

Directors: Sobey Martin
Watch Now:AmazonApple TV
One of Our Dogs is Missing
star
7.46
61 votes

#16 - One of Our Dogs is Missing

Season 1 - Episode 13 - Aired 12/8/1965

Dr. Smith and the women discover that their spaceship has been looted.

Directors: Sutton Roley
Watch Now:AmazonApple TV
All That Glitters
star
7.45
64 votes

#17 - All That Glitters

Season 1 - Episode 26 - Aired 4/6/1966

Penny shelters an interplanetary fugitive who gives her a small disc that is supposedly the key to the greatest treasure in the galaxy.

Directors: Harry Harris
Watch Now:AmazonApple TV
Island in the Sky
star
7.42
128 votes

#18 - Island in the Sky

Season 1 - Episode 3 - Aired 9/29/1965

John descends from the orbiting spaceship to explore a planet that the Robinson's are planning to land on.

Watch Now:AmazonApple TV
There Were Giants in the Earth
star
7.42
113 votes

#19 - There Were Giants in the Earth

Season 1 - Episode 4 - Aired 10/6/1965

The Robinsons discover strange forms of life where they have established a self-sustaining community.

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Attack of the Monster Plants
star
7.37
46 votes

#20 - Attack of the Monster Plants

Season 1 - Episode 14 - Aired 12/15/1965

Plants grow to huge proportions and Smith schemes to steal the canisters containing the spaceship’s fuel supply.

Watch Now:AmazonApple TV
The Reluctant Stowaway
star
7.30
330 votes

#21 - The Reluctant Stowaway

Season 1 - Episode 1 - Aired 9/15/1965

In 1997, the Robinsons take off on the first mission to colonize space only to discover an enemy agent aboard their spacecraft.

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His Majesty, Smith
star
7.30
67 votes

#22 - His Majesty, Smith

Season 1 - Episode 24 - Aired 3/16/1966

Visitors from Andronica are looking for a king – a position Dr. Smith feels uniquely qualified to fill.

Directors: Harry Harris
Watch Now:AmazonApple TV
The Raft
star
7.29
52 votes

#23 - The Raft

Season 1 - Episode 12 - Aired 12/1/1965

The Robinsons construct a two-man vehicle to fly back to Earth.

Directors: Sobey Martin
Writer: Peter Packer
Watch Now:AmazonApple TV
The Derelict
star
7.28
205 votes

#24 - The Derelict

Season 1 - Episode 2 - Aired 9/22/1965

John and Maureen, trying to return to their spaceship, are threatened by a comet.

Writer: Peter Packer
Watch Now:AmazonApple TV
Welcome Stranger
star
7.26
89 votes

#25 - Welcome Stranger

Season 1 - Episode 6 - Aired 10/20/1965

The Robinsons are visited by a long-lost astronaut, who agrees to help their children return to Earth.

Directors: Alvin Ganzer
Writer: Peter Packer
Watch Now:AmazonApple TV