Lost in Space — 1965-1968 · 3 seasons · 84 eps

★ 7.3

Lost in Space poster

Lost in Space

1965-1968 3 seasons 84 episodes

★ 7.3 (9,685 votes) Bottom 41%

The space family Robinson is sent on a five-year mission to find a new planet to colonise. 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

Episode Ratings Grid

Every episode at a glance, color-coded by rating. Rows are episode numbers within each season, columns are seasons.

Size: M

S1

S2

S3

E1

7.6

7.0

7.4

E2

7.9

7.0

7.8

E3

7.2

7.3

6.6

E4

7.6

6.5

7.3

E5

7.7

6.2

6.4

E6

8.0

7.5

7.1

E7

7.0

7.2

6.3

E8

7.9

6.4

7.5

E9

7.8

6.1

5.8

E10

6.7

6.1

7.4

E11

7.3

5.9

6.4

E12

7.9

6.7

5.8

E13

6.9

7.3

5.8

E14

6.7

6.8

5.3

E15

7.1

6.9

8.4

E16

8.3

5.6

7.0

E17

8.1

4.8

5.5

E18

7.9

5.7

7.4

E19

6.5

4.6

6.7

E20

6.8

4.8

6.6

E21

8.0

5.8

5.7

E22

7.4

6.6

6.2

E23

7.7

6.2

5.1

E24

6.8

7.0

5.8

E25

7.3

6.6

E26

6.5

7.6

E27

7.4

6.9

E28

7.0

6.9

E29

7.3

6.4

E30

8.2

6.9

Avg

7.4

6.4

6.6

Great

Good

Mid

Bad

Awful

Episode Power Rankings

The best and worst episodes at a glance. Use this to find must-watch episodes or ones you might want to skip.

🏆 Top Episodes

#1 8.4

S3E15 The Anti-Matter Man

#2

S1E15 8.3

Return from Outer Space

#3

S1E29 8.2

Follow the Leader

4. S1E16 "The Keeper: Part 1" 8.1
5. S1E5 "The Hungry Sea" 8.0
6. S1E20 "War of the Robots" 8.0
7. S1E1 "The Reluctant Stowaway" 7.9
8. S1E7 "My Friend, Mr. Nobody" 7.9
9. S1E11 "Wish Upon a Star" 7.9
10. S1E17 "The Keeper: Part 2" 7.9

📉 Bottom Episodes

#84

S2E19 4.6

Mutiny in Space

83. S2E20 "The Space Vikings" 4.8
82. S2E17 "The Questing Beast" 4.8
81. S3E23 "The Great Vegetable Rebellion" 5.1
80. S3E14 "Castles in Space" 5.3

The Quality Arc

Each point is an episode, plotted chronologically. The colored bands mark season boundaries. Look for upward or downward trends to see if quality improved or declined over time.

Trend

Episode Engagement

Vote count shows how many people cared enough to rate. High votes + high rating = beloved classic. High votes + low rating = notorious stinker. Low votes + high rating = hidden gem.

Rating threshold:

18 Standouts

24 Infamous

1 Hidden Gems

41 Forgettable

Top Standout: S1E15 Return from Outer Space

Most Infamous: S2E17 The Questing Beast

Best Hidden Gem: S3E8 Flight Into the Future

Episodes plotted by rating vs. vote count. The vertical line marks the rating threshold (7.5). More votes = more engagement. Toggle above to compare against global or show-specific median.

Series Trajectory

A simplified view: one point per season. This smooths out episode-to-episode noise to show the overall arc of the series.

Trend

Season Momentum

Did each season build momentum or fizzle out? Green arrows mean the finale rated higher than the premiere. Red means the opposite. Longer arrows = bigger swings.

Season Consistency

Some seasons are reliable bangers. Others are hit-or-miss. Each dot is an episode. Tightly clustered dots mean consistent quality. Scattered dots mean a mixed bag.

Each dot is an episode. Clustered dots = consistent quality. Scattered dots = variable season. Hover for episode details.