The BEST Episodes of Lost in Space

Every episode ever - ranked by fan votes!

Last Updated: Jul 12, 2019

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

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

star 7.81
27 votes
Directors: Don Richardson
Writers: Barney Slater
The Flaming Planet

#2 - The Flaming Planet

Season 3 - Episode 22

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

star 7.70
20 votes
Directors: Don Richardson
Writers: Barney Slater
The Space Primevals

#3 - The Space Primevals

Season 3 - Episode 5

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

star 7.68
25 votes
Directors: Nathan Juran
Writers: Peter Packer
The War of the Robots

#4 - The War of the Robots

Season 1 - Episode 20

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

star 7.66
38 votes
Directors: Sobey Martin
Writers: Barney Slater
The Space Creature

#5 - The Space Creature

Season 3 - Episode 10

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

star 7.62
21 votes
Directors: Sobey Martin
Writers: William Welch
Follow the Leader

#6 - Follow the Leader

Season 1 - Episode 29

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

star 7.61
31 votes
Directors: Don Richardson
Writers: Barney Slater
Target: Earth

#7 - Target: Earth

Season 3 - Episode 16

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

star 7.61
18 votes
Directors: Nathan Juran
Writers: Peter Packer
Wish Upon a Star

#8 - Wish Upon a Star

Season 1 - Episode 11

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

star 7.61
46 votes
Directors: Sutton Roley
Writers: Barney Slater
Wreck of the Robot

#9 - Wreck of the Robot

Season 2 - Episode 13

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

star 7.60
25 votes
Directors: Nathan Juran
Writers: Barney Slater
Hunter's Moon

#10 - Hunter's Moon

Season 3 - Episode 4

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

star 7.59
17 votes
Directors: Don Richardson
Writers: Jack Turley
Flight into the Future

#11 - Flight into the Future

Season 3 - Episode 8

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

star 7.54
24 votes
Directors: Sobey Martin
Writers: Peter Packer
The Magic Mirror

#12 - The Magic Mirror

Season 1 - Episode 21

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

star 7.54
28 votes
Directors: Nathan Juran
Writers: Jackson Gillis
West of Mars

#13 - West of Mars

Season 2 - Episode 11

Dr Smith is mistaken for a notorious outlaw.

star 7.52
21 votes
Directors: Nathan Juran
Writers: Michael Fessier
Ghost in Space

#14 - Ghost in Space

Season 1 - Episode 19

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

star 7.52
31 votes
Directors: Sobey Martin
Writers: Barney Slater
A Visit to Hades

#15 - A Visit to Hades

Season 2 - Episode 12

Smith is transported to a hellish place where he becomes the terrified tool of a satanic stranger.

star 7.50
22 votes
Directors: Don Richardson
Writers: Carey Wilbur, Carey Wilber
The Golden Man

#16 - The Golden Man

Season 2 - Episode 15

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

star 7.50
22 votes
Directors: Don Richardson
Writers: Barney Slater
The Sky Pirate

#17 - The Sky Pirate

Season 1 - Episode 18

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

star 7.48
25 votes
Directors: Sobey Martin
Writers: Carey Wilbur, Carey Wilber
Deadliest of the Species

#18 - Deadliest of the Species

Season 3 - Episode 11

The Robinsons’ robot flips over a mechanical beauty programmed for pure evil. Robot: Bob May.

star 7.47
19 votes
Directors: Sobey Martin
Writers: Robert Hamner
Two Weeks in Space

#19 - Two Weeks in Space

Season 3 - Episode 13

Smith turns the Jupiter 2 into a hotel for humanoids, unaware that they are fugitives from space justice.

star 7.47
15 votes
Directors: Don Richardson
Writers: Robert Hamner
Return from Outer Space

#20 - Return from Outer Space

Season 1 - Episode 15

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

star 7.46
50 votes
Directors: Nathan Juran
Writers: Peter Packer
The Promised Planet

#21 - The Promised Planet

Season 3 - Episode 19

The Robinsons get a reception on a planet populated by music-loving teenagers.

star 7.44
18 votes
Directors: Ezra Stone
Writers: Peter Packer
Space Beauty

#22 - Space Beauty

Season 3 - Episode 21

Trouble begins when Dr. Smith tricks Judy into entering an enigmatic dictator’s beauty contest.

star 7.44
18 votes
Directors: Irving J. Moore
Writers: Jackson Gillis
The Astral Traveler

#23 - The Astral Traveler

Season 2 - Episode 29

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

star 7.43
14 votes
Directors: Don Richardson
Writers: Carey Wilbur, Carey Wilber
The Cave of the Wizards

#24 - The Cave of the Wizards

Season 2 - Episode 22

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

star 7.41
17 votes
Directors: Don Richardson
Writers: Peter Packer
Collision of the Planets

#25 - Collision of the Planets

Season 3 - Episode 9

The Robinson's come across a group of space hippies who are trying to destroy the planet the Robinson's currently inhabit.

star 7.41
17 votes
Directors: Don Richardson
Writers: Peter Packer