Lost in Space Episode Ratings Heatmap
1965 · 3 Seasons · 83 Episodes · Overall Score: 6.1/10 (29 rated)
Season 1 holds the highest collective average score across the series.
Season 1 Details →Lowest score variance (σ = 0.62), maintaining an average of 6.1.
Complete Episode Rating Matrix
Interactive score chart by season and episode number. Darker green indicates higher ratings; amber and red denote lower reception.
| Episode | Season 1 | Season 2 | Season 3 |
|---|---|---|---|
| Ep 1 | 7.0 | – | – |
| Ep 2 | 6.5 | – | – |
| Ep 3 | 6.7 | – | – |
| Ep 4 | 7.0 | – | – |
| Ep 5 | 6.0 | – | – |
| Ep 6 | 5.3 | – | – |
| Ep 7 | 6.3 | – | – |
| Ep 8 | 7.0 | – | – |
| Ep 9 | 5.7 | – | – |
| Ep 10 | 5.3 | – | – |
| Ep 11 | 6.3 | – | – |
| Ep 12 | 6.7 | – | – |
| Ep 13 | 6.0 | – | – |
| Ep 14 | 5.8 | – | – |
| Ep 15 | 6.3 | – | – |
| Ep 16 | 6.7 | – | – |
| Ep 17 | 6.7 | – | – |
| Ep 18 | 5.5 | – | – |
| Ep 19 | 6.0 | – | – |
| Ep 20 | 6.7 | – | – |
| Ep 21 | 6.3 | – | – |
| Ep 22 | 6.0 | – | – |
| Ep 23 | 5.3 | – | – |
| Ep 24 | 5.3 | – | – |
| Ep 25 | 5.0 | – | – |
| Ep 26 | 5.3 | – | – |
| Ep 27 | 6.0 | – | – |
| Ep 28 | 5.5 | – | – |
| Ep 29 | 7.0 | – | – |
| Ep 30 | – | – | – |
| Season Avg | 6.1 | – | – |
Ratings Analysis & Trajectory
Across 3 seasons and 83 episodes, Lost in Space has earned an overall series rating of 6.1 out of 10. The series displays remarkable consistency across its narrative arc, maintaining reliable ratings from premiere to conclusion.
The single highest-rated hour of television in the series is Season 1, Episode 1 ("The Reluctant Stowaway"), rated at an extraordinary 7.0/10 with 4 ratings. Conversely, the lowest-rated installment is Season 1, Episode 25 ("The Space Croppers"), landing at 5.0/10.
The most precipitous single-episode shift occurred in Season 1 between Episode 8 ("Invaders from the Fifth Dimension", 7) and Episode 9 ("The Oasis", 5.7), a swing of 1.3 points.
Top 10 Highest Rated Episodes of Lost in Space
| Rank | Episode | Title | Score | Votes | Air Date |
|---|---|---|---|---|---|
| #1 | Season 1, Ep 1 | The Reluctant Stowaway | 7.0 | 4 | Sep 15, 1965 |
| #2 | Season 1, Ep 4 | There Were Giants in the Earth | 7.0 | 3 | Oct 6, 1965 |
| #3 | Season 1, Ep 8 | Invaders from the Fifth Dimension | 7.0 | 3 | Nov 3, 1965 |
| #4 | Season 1, Ep 29 | Follow the Leader | 7.0 | 3 | Apr 27, 1966 |
| #5 | Season 1, Ep 3 | Island in the Sky | 6.7 | 3 | Sep 29, 1965 |
| #6 | Season 1, Ep 12 | The Raft | 6.7 | 3 | Dec 1, 1965 |
| #7 | Season 1, Ep 16 | The Keeper (1) | 6.7 | 3 | Jan 12, 1966 |
| #8 | Season 1, Ep 17 | The Keeper (2) | 6.7 | 3 | Jan 19, 1966 |
| #9 | Season 1, Ep 20 | War of the Robots | 6.7 | 3 | Feb 9, 1966 |
| #10 | Season 1, Ep 2 | The Derelict | 6.5 | 4 | Sep 22, 1965 |