The BEST Episodes of Lost in Space

Every episode ever - ranked by fan votes!

Last Updated: Jan 29, 2020

Network: CBS

The space family Robinson is sent on a five-year mission to find a new planet to colonize, but 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 ('Danger, Will Robinson' became the show's catchphrase). The sci-fi cult favorite was created by Irwin Allen, and inspired an uninspired 1998 movie.

The Challenge

#1 - The Challenge

Season 1 - Episode 22 - Aired Mar 2, 1966

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

star 7.75
28 votes
Directors: Don Richardson
Writers: Barney Slater
Follow the Leader

#2 - Follow the Leader

Season 1 - Episode 29 - Aired Apr 27, 1966

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

star 7.69
32 votes
Directors: Don Richardson
Writers: Barney Slater
The War of the Robots

#3 - The War of the Robots

Season 1 - Episode 20 - Aired Feb 9, 1966

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

star 7.62
39 votes
Directors: Sobey Martin
Writers: Barney Slater
Space Creature

#4 - Space Creature

Season 3 - Episode 10 - Aired Nov 15, 1967

A blue mist causes the travelers to disappear one by one until only Will is left.

star 7.61
23 votes
Directors: Sobey Martin
Writers: William Welch
Wish Upon a Star

#5 - Wish Upon a Star

Season 1 - Episode 11 - Aired Nov 24, 1965

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

star 7.60
48 votes
Directors: Sutton Roley
Writers: Barney Slater
The Flaming Planet

#6 - The Flaming Planet

Season 3 - Episode 22 - Aired Feb 21, 1968

The Robinsons must contend with a rapidly growing plant and missiles fired by aliens.

star 7.59
22 votes
Directors: Don Richardson
Writers: Barney Slater
Hunter's Moon

#7 - Hunter's Moon

Season 3 - Episode 4 - Aired Sep 27, 1967

John is captured by a maniacal humanoid and made the quarry in a sadistic big-game hunt.

star 7.58
19 votes
Directors: Don Richardson
Writers: Jack Turley
Target Earth

#8 - Target Earth

Season 3 - Episode 16 - Aired Jan 3, 1968

Will tries to brew dissension among shapeless aliens who plan to conquer Earth.

star 7.55
22 votes
Directors: Nathan Juran
Writers: Peter Packer
Ghost in Space

#9 - Ghost in Space

Season 1 - Episode 19 - Aired Feb 2, 1966

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

star 7.53
32 votes
Directors: Sobey Martin
Writers: Barney Slater
The Golden Man

#10 - The Golden Man

Season 2 - Episode 15 - Aired Dec 28, 1966

The Robinson women and Dr Smith become involved in a war between the leaders of two alien civilizations.

star 7.52
23 votes
Directors: Don Richardson
Writers: Barney Slater
The Space Primevals

#11 - The Space Primevals

Season 3 - Episode 5 - Aired Oct 4, 1967

In an attempt to rescue Don and Smith, the Robinsons pit their robot against a computer that rules a race of primitive aliens.

star 7.52
27 votes
Directors: Nathan Juran
Writers: Peter Packer
The Magic Mirror

#12 - The Magic Mirror

Season 1 - Episode 21 - Aired Feb 16, 1966

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

star 7.48
29 votes
Directors: Nathan Juran
Writers: Jackson Gillis
Flight into the Future

#13 - Flight into the Future

Season 3 - Episode 8 - Aired Oct 25, 1967

The space adventurers search for reality in a world of fantastic illusions.

star 7.43
28 votes
Directors: Sobey Martin
Writers: Peter Packer
Visit to a Hostile Planet

#14 - Visit to a Hostile Planet

Season 3 - Episode 2 - Aired Sep 13, 1967

A time warp transports the travelers to a hostile planet – Earth as it was in 1947.

star 7.42
33 votes
Directors: Sobey Martin
Writers: Peter Packer
The Sky Pirate

#15 - The Sky Pirate

Season 1 - Episode 18 - Aired Jan 26, 1966

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

star 7.42
26 votes
Directors: Sobey Martin
Writers: Carey Wilber, Carey Wilbur
The Sky is Falling

#16 - The Sky is Falling

Season 1 - Episode 10 - Aired Nov 17, 1965

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

star 7.40
67 votes
Directors: Sutton Roley
Writers: Barney Slater, Herman Groves
My Friend, Mr. Nobody

#17 - My Friend, Mr. Nobody

Season 1 - Episode 7 - Aired Oct 27, 1965

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

star 7.39
74 votes
Directors: Paul Stanley
Writers: Jackson Gillis
Trip Through the Robot

#18 - Trip Through the Robot

Season 2 - Episode 26 - Aired Mar 22, 1967

Will and Dr. Smith try to repair the robot, which has grown to the size of a house.

star 7.38
21 votes
Invaders from the Fifth Dimension

#19 - Invaders from the Fifth Dimension

Season 1 - Episode 8 - Aired Nov 3, 1965

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

star 7.37
73 votes
Directors: Leonard Horn
Writers: Shimon Wincelberg
West of Mars

#20 - West of Mars

Season 2 - Episode 11 - Aired Nov 23, 1966

Dr Smith is mistaken for a notorious outlaw.

star 7.36
22 votes
Directors: Nathan Juran
Writers: Michael Fessier
Return from Outer Space

#21 - Return from Outer Space

Season 1 - Episode 15 - Aired Dec 29, 1965

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

star 7.34
79 votes
Directors: Nathan Juran
Writers: Peter Packer
Condemned of Space

#22 - Condemned of Space

Season 3 - Episode 1 - Aired Sep 6, 1967

The Robinsons board a computer-controlled spacecraft filled with frozen men.

star 7.33
33 votes
Directors: Nathan Juran
Writers: Peter Packer
The Cave of the Wizards

#23 - The Cave of the Wizards

Season 2 - Episode 22 - Aired Feb 22, 1967

Smith is lured into a tomblike cave, where he falls under the spell of a computer.

star 7.33
18 votes
Directors: Don Richardson
Writers: Peter Packer
The Astral Traveler

#24 - The Astral Traveler

Season 2 - Episode 29 - Aired Apr 12, 1967

While exploring a mysterious cave, Will is transported through space to a haunted Scottish castle.

star 7.31
16 votes
Directors: Don Richardson
Writers: Carey Wilber, Carey Wilbur
Wreck of the Robot

#25 - Wreck of the Robot

Season 2 - Episode 13 - Aired Dec 14, 1966

The robot is being used to help create a sinister army of machines.

star 7.30
53 votes
Directors: Nathan Juran
Writers: Barney Slater