The BEST Episodes of Lost in Space
Every episode ever - ranked by fan votes!
Last Updated: Aug 13, 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.
#1 - The Challenge
Season 1 - Episode 22
The Robinsons encounter a militant boy who is determined to prove his superiority over the earthlings.
7.81 
#2 - The Flaming Planet
Season 3 - Episode 22
The Robinsons must contend with a rapidly growing plant and missiles fired by aliens.
7.70 
#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.
7.68 
#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.
7.66 
#5 - The Space Creature
Season 3 - Episode 10
A blue mist causes the travelers to disappear one by one until only Will is left.
7.62 
#6 - Follow the Leader
Season 1 - Episode 29
John falls into a cave containing a centuries-old mummy, whose spirit possesses John’s body.
7.61 
#7 - Target: Earth
Season 3 - Episode 16
Will tries to brew dissension among shapeless aliens who plan to conquer Earth.
7.61 
#8 - Wish Upon a Star
Season 1 - Episode 11
Will and Dr. Smith discover a device that transforms wishes into realities.
7.61 
#9 - Wreck of the Robot
Season 2 - Episode 13
The robot is being used to help create a sinister army of machines.
7.60 
#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.
7.59 
#11 - Flight into the Future
Season 3 - Episode 8
The space adventurers search for reality in a world of fantastic illusions.
7.54 
#12 - The Magic Mirror
Season 1 - Episode 21
Penny discovers an extraordinary mirror which reflects a world that does not exist.
7.54 
#13 - West of Mars
Season 2 - Episode 11
Dr Smith is mistaken for a notorious outlaw.
7.52 
#14 - Ghost in Space
Season 1 - Episode 19
Smith sets off an explosion in a bog, arousing an invisible, indestructible, and irresistible, creature.
7.52 
#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.
7.50 
#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.
7.50 
#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.
7.48 
#18 - Deadliest of the Species
Season 3 - Episode 11
The Robinsons’ robot flips over a mechanical beauty programmed for pure evil. Robot: Bob May.
7.47 
#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.
7.47 
#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.
7.46 
#21 - The Promised Planet
Season 3 - Episode 19
The Robinsons get a reception on a planet populated by music-loving teenagers.
7.44 
#22 - Space Beauty
Season 3 - Episode 21
Trouble begins when Dr. Smith tricks Judy into entering an enigmatic dictator’s beauty contest.
7.44 
#23 - The Astral Traveler
Season 2 - Episode 29
While exploring a mysterious cave, Will is transported through space to a haunted Scottish castle.
7.43 
#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.
7.41 
#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.
7.41