The BEST Episodes of Lost in Space

Every episode ever - ranked by fan votes!

Last Updated: Dec 24, 2019

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

#2 - 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 7.67
21 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 7.66
38 votes
Directors: Sobey Martin
Writers: Barney Slater
The Space Primevals

#4 - 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 7.65
26 votes
Directors: Nathan Juran
Writers: Peter Packer
Target Earth

#5 - Target Earth

Season 3 - Episode 16 - Aired Jan 3, 1968

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

star 7.62
21 votes
Directors: Nathan Juran
Writers: Peter Packer
Follow the Leader

#6 - 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 7.61
31 votes
Directors: Don Richardson
Writers: Barney Slater
Wish Upon a Star

#7 - 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
47 votes
Directors: Sutton Roley
Writers: Barney Slater
Space Creature

#8 - 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 7.59
22 votes
Directors: Sobey Martin
Writers: William Welch
Hunter's Moon

#9 - 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 7.56
18 votes
Directors: Don Richardson
Writers: Jack Turley
The Magic Mirror

#10 - 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 7.54
28 votes
Directors: Nathan Juran
Writers: Jackson Gillis
West of Mars

#11 - West of Mars

Season 2 - Episode 11 - Aired Nov 23, 1966

Dr Smith is mistaken for a notorious outlaw.

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

#12 - 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 7.52
31 votes
Directors: Sobey Martin
Writers: Barney Slater
The Golden Man

#13 - 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 7.50
22 votes
Directors: Don Richardson
Writers: Barney Slater
Flight into the Future

#14 - 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 7.50
26 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 7.48
25 votes
Directors: Sobey Martin
Writers: Carey Wilber, Carey Wilbur
Deadliest of the Species

#16 - Deadliest of the Species

Season 3 - Episode 11 - Aired Nov 22, 1967

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

star 7.45
20 votes
Directors: Sobey Martin
Writers: Robert Hamner
Two Weeks in Space

#17 - Two Weeks in Space

Season 3 - Episode 13 - Aired Dec 13, 1967

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

star 7.44
16 votes
Directors: Don Richardson
Writers: Robert Hamner
The Promised Planet

#18 - The Promised Planet

Season 3 - Episode 19 - Aired Jan 24, 1968

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

star 7.42
19 votes
Directors: Ezra Stone
Writers: Peter Packer
The Cave of the Wizards

#19 - 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 7.41
17 votes
Directors: Don Richardson
Writers: Peter Packer
The Astral Traveler

#20 - 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 7.40
15 votes
Directors: Don Richardson
Writers: Carey Wilber, Carey Wilbur
Space Beauty

#21 - Space Beauty

Season 3 - Episode 21 - Aired Feb 14, 1968

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

star 7.40
20 votes
Directors: Irving J. Moore
Writers: Jackson Gillis
Collision of Planets

#22 - Collision of Planets

Season 3 - Episode 9 - Aired Nov 8, 1967

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

star 7.39
18 votes
Directors: Don Richardson
Writers: Peter Packer
Condemned of Space

#23 - Condemned of Space

Season 3 - Episode 1 - Aired Sep 6, 1967

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

star 7.38
32 votes
Directors: Nathan Juran
Writers: Peter Packer
Invaders from the Fifth Dimension

#24 - 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
70 votes
Directors: Leonard Horn
Writers: Shimon Wincelberg
The Space Trader

#25 - The Space Trader

Season 1 - Episode 23 - Aired Mar 9, 1966

The Robinsons are victimized by a huckster who will stop at nothing to get their equipment.

star 7.36
25 votes
Directors: Nathan Juran
Writers: Barney Slater