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.
#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.
7.75 
#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.
7.69 
#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.
7.62 
#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.
7.61 
#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.
7.60 
#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.
7.59 
#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.
7.58 
#8 - Target Earth
Season 3 - Episode 16 - Aired Jan 3, 1968
Will tries to brew dissension among shapeless aliens who plan to conquer Earth.
7.55 
#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.
7.53 
#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.
7.52 
#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.
7.52 
#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.
7.48 
#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.
7.43 
#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.
7.42 
#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.
7.42 
#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.
7.40 
#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.
7.39 
#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.
7.38 
#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.
7.37 
#20 - West of Mars
Season 2 - Episode 11 - Aired Nov 23, 1966
Dr Smith is mistaken for a notorious outlaw.
7.36 
#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.
7.34 
#22 - Condemned of Space
Season 3 - Episode 1 - Aired Sep 6, 1967
The Robinsons board a computer-controlled spacecraft filled with frozen men.
7.33 
#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.
7.33 
#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.
7.31 
#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.
7.30