Lost in Space

The BEST episodes of Lost in Space

Every episode ever - ranked by fan votes!

A space colony family struggles to survive when a spy/accidental stowaway throws their ship hopelessly off course.

Last Updated: 5/1/2022Network: CBS
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The Anti-Matter Man
star
8.31
16 votes

#1 - The Anti-Matter Man

Season 3 - Episode 15 - Aired 12/27/1967

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

Directors: Sutton Roley
Watch Now:AmazoniTunes
Follow the Leader
star
8.21
42 votes

#2 - Follow the Leader

Season 1 - Episode 29 - Aired 4/27/1966

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

Directors: Don Richardson
Watch Now:AmazoniTunes
The Challenge
star
8.14
37 votes

#3 - The Challenge

Season 1 - Episode 22 - Aired 3/2/1966

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

Directors: Don Richardson
Watch Now:AmazoniTunes
War of the Robots
star
8.02
49 votes

#4 - War of the Robots

Season 1 - Episode 20 - Aired 2/9/1966

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

Directors: Sobey Martin
Watch Now:AmazoniTunes
Wish Upon a Star
star
7.85
60 votes

#5 - Wish Upon a Star

Season 1 - Episode 11 - Aired 11/24/1965

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

Directors: Sutton Roley
Watch Now:AmazoniTunes
The Magic Mirror
star
7.84
38 votes

#6 - The Magic Mirror

Season 1 - Episode 21 - Aired 2/16/1966

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

Directors: Nathan Juran
Watch Now:AmazoniTunes
The Sky Pirate
star
7.77
35 votes

#7 - The Sky Pirate

Season 1 - Episode 18 - Aired 1/26/1966

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

Directors: Sobey Martin
Watch Now:AmazoniTunes
The Sky is Falling
star
7.71
79 votes

#8 - The Sky is Falling

Season 1 - Episode 10 - Aired 11/17/1965

The Robinsons encounter a family of crablike visitors who are far from friendly.

Directors: Sutton Roley
Watch Now:AmazoniTunes
The Keeper (1)
star
7.67
55 votes

#9 - The Keeper (1)

Season 1 - Episode 16 - Aired 1/12/1966

The castaways’ planet is visited by a being traveling the universe to collect creatures—two of every kind.

Directors: Harry Harris
Watch Now:AmazoniTunes
Return from Outer Space
star
7.66
90 votes

#10 - Return from Outer Space

Season 1 - Episode 15 - Aired 12/29/1965

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

Directors: Nathan Juran
Watch Now:AmazoniTunes
The Golden Man
star
7.66
29 votes

#11 - The Golden Man

Season 2 - Episode 15 - Aired 12/28/1966

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

Directors: Don Richardson
Watch Now:AmazoniTunes
The Keeper (2)
star
7.65
46 votes

#12 - The Keeper (2)

Season 1 - Episode 17 - Aired 1/19/1966

The Robinsons must turn Penny and Will over or face death.

Directors: Harry Harris
Watch Now:AmazoniTunes
Invaders from the Fifth Dimension
star
7.65
89 votes

#13 - Invaders from the Fifth Dimension

Season 1 - Episode 8 - Aired 11/3/1965

The travelers are menaced by glowing creatures who are looking for a humanoid brain.

Directors: Leonard J. Horn
Watch Now:AmazoniTunes
My Friend, Mr. Nobody
star
7.61
89 votes

#14 - My Friend, Mr. Nobody

Season 1 - Episode 7 - Aired 10/27/1965

Penny discovers a deep cave inhabited by an invisible but seemingly friendly voice.

Directors: Paul Stanley
Watch Now:AmazoniTunes
Ghost in Space
star
7.60
40 votes

#15 - Ghost in Space

Season 1 - Episode 19 - Aired 2/2/1966

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

Directors: Sobey Martin
Watch Now:AmazoniTunes
Target Earth
star
7.57
30 votes

#16 - Target Earth

Season 3 - Episode 16 - Aired 1/3/1968

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

Directors: Nathan Juran
Watch Now:AmazoniTunes
One of Our Dogs is Missing
star
7.53
59 votes

#17 - One of Our Dogs is Missing

Season 1 - Episode 13 - Aired 12/8/1965

Dr. Smith and the women discover that their spaceship has been looted.

Directors: Sutton Roley
Watch Now:AmazoniTunes
The Hungry Sea
star
7.51
107 votes

#18 - The Hungry Sea

Season 1 - Episode 5 - Aired 10/13/1965

An earthquake threatens to seal the cave where Don, Judy, Will, and Penny are trapped.

Watch Now:AmazoniTunes
All That Glitters
star
7.47
59 votes

#19 - All That Glitters

Season 1 - Episode 26 - Aired 4/6/1966

Penny shelters an interplanetary fugitive who gives her a small disc that is supposedly the key to the greatest treasure in the galaxy.

Directors: Harry Harris
Watch Now:AmazoniTunes
Blast Off into Space
star
7.47
109 votes

#20 - Blast Off into Space

Season 2 - Episode 1 - Aired 9/16/1966

Dr Smith and Will befriend an old miner named Nerim. After a series of earthquakes indicates that the planet is breaking up, Dr Smith tries to convince them that it is merely the effects of mining, and no harm will come to the planet. John informs him that he is wrong and that the Robinson family will be departing within the day. It is a race against time to escape the crumbling planet.

Directors: Nathan Juran
Watch Now:AmazoniTunes
The Oasis
star
7.47
88 votes

#21 - The Oasis

Season 1 - Episode 9 - Aired 11/10/1965

The Robinsons face dangers on strange terrain, where water is running low and the heat is getting more intense.

Watch Now:AmazoniTunes
His Majesty, Smith
star
7.44
63 votes

#22 - His Majesty, Smith

Season 1 - Episode 24 - Aired 3/16/1966

Visitors from Andronica are looking for a king – a position Dr. Smith feels uniquely qualified to fill.

Directors: Harry Harris
Watch Now:AmazoniTunes
Hunter's Moon
star
7.44
25 votes

#23 - Hunter's Moon

Season 3 - Episode 4 - Aired 9/27/1967

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

Directors: Don Richardson
Watch Now:AmazoniTunes
Visit to a Hostile Planet
star
7.41
41 votes

#24 - Visit to a Hostile Planet

Season 3 - Episode 2 - Aired 9/13/1967

A time warp transports the travelers to a hostile planet – Earth as it was in 1947.

Directors: Sobey Martin
Watch Now:AmazoniTunes
Space Creature
star
7.41
27 votes

#25 - Space Creature

Season 3 - Episode 10 - Aired 11/15/1967

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

Directors: Sobey Martin
Watch Now:AmazoniTunes