The BEST Episodes of Lost in Space

Every episode ever - ranked by fan votes!

Last Updated: Oct 12, 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 7.84
31 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 7.80
35 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 7.72
43 votes
Directors: Sobey Martin
Writers: Barney Slater
Wish Upon a Star

#4 - 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 7.63
52 votes
Directors: Sutton Roley
Writers: Barney Slater
Ghost in Space

#5 - 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 7.61
36 votes
Directors: Sobey Martin
Writers: Barney Slater
Hunter's Moon

#6 - 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 7.60
20 votes
Directors: Don Richardson
Writers: Jack Turley
Target Earth

#7 - Target Earth

Season 3 - Episode 16 - Aired Jan 3, 1968

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

star 7.60
25 votes
Directors: Nathan Juran
Writers: Peter Packer
The Magic Mirror

#8 - 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 7.59
32 votes
Directors: Nathan Juran
Writers: Jackson Gillis
The Golden Man

#9 - 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 7.58
26 votes
Directors: Don Richardson
Writers: Barney Slater
The Flaming Planet

#10 - 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 7.54
24 votes
Directors: Don Richardson
Writers: Barney Slater
Space Creature

#11 - 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 7.54
24 votes
Directors: Sobey Martin
Writers: William Welch
The Space Primevals

#12 - 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 7.54
28 votes
Directors: Nathan Juran
Writers: Peter Packer
Visit to a Hostile Planet

#13 - 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 7.50
34 votes
Directors: Sobey Martin
Writers: Peter Packer
The Anti-Matter Man

#14 - The Anti-Matter Man

Season 3 - Episode 15 - Aired Dec 27, 1967

Will and the robot try to rescue the kidnapped Prof. Robinson in a macabre world of orange grass, polka-dotted leaves, and animated rocks.

star 7.50
10 votes
Directors: Sutton Roley
Writers: Barney Slater, Robert Hamner
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
29 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 7.45
73 votes
Directors: Sutton Roley
Writers: Barney Slater, Herman Groves
The Promised Planet

#17 - 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 7.43
23 votes
Directors: Ezra Stone
Writers: Peter Packer
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 7.43
23 votes
My Friend, Mr. Nobody

#19 - 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 7.42
79 votes
Directors: Paul Stanley
Writers: Jackson Gillis
Return from Outer Space

#20 - 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 7.41
82 votes
Directors: Nathan Juran
Writers: Peter Packer
Invaders from the Fifth Dimension

#21 - 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 7.41
79 votes
Directors: Leonard Horn
Writers: Shimon Wincelberg
The Astral Traveler

#22 - 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 7.39
18 votes
Directors: Don Richardson
Writers: Carey Wilber, Carey Wilbur
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 7.35
34 votes
Directors: Nathan Juran
Writers: Peter Packer
The Mechanical Men

#24 - The Mechanical Men

Season 2 - Episode 28 - Aired Apr 5, 1967

To provide themselves with a leader, tiny mechanical men interchange the personalities of Smith and the robot.

star 7.35
20 votes
Directors: Seymour Robbie
Writers: Barney Slater
The Galaxy Gift

#25 - The Galaxy Gift

Season 2 - Episode 30 - Aired Apr 26, 1967

Aliens enlist Dr Smith’s help to obtain a valuable amulet that could destroy the galaxy.

star 7.33
21 votes
Directors: Ezra Stone
Writers: Barney Slater