Sealab 2021 Episode Ratings Heatmap
2000 · 5 Seasons · 52 Episodes · Overall Score: 8.2/10 (52 rated)
Season 3 holds the highest collective average score across the series.
Season 3 Details →Lowest score variance (σ = 0.58), maintaining an average of 7.9.
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 | Season 4 | Season 5 |
|---|---|---|---|---|---|
| Ep 1 | 8.0 | 8.3 | 10.0 | 9.0 | 7.0 |
| Ep 2 | 7.8 | 10.0 | 6.3 | 9.0 | 8.0 |
| Ep 3 | 7.3 | 7.0 | 10.0 | 8.0 | 7.0 |
| Ep 4 | 7.7 | 8.0 | 9.5 | 7.0 | 9.0 |
| Ep 5 | 8.0 | 8.0 | 9.5 | 9.0 | 7.0 |
| Ep 6 | 8.3 | 8.0 | 9.5 | 9.0 | 6.0 |
| Ep 7 | 8.0 | 9.5 | 10.0 | 9.0 | 9.0 |
| Ep 8 | 6.7 | 9.0 | 9.5 | 7.0 | 10.0 |
| Ep 9 | 8.8 | 7.0 | 8.5 | 7.0 | – |
| Ep 10 | 8.3 | 6.0 | 8.0 | 6.0 | – |
| Ep 11 | – | 9.0 | 8.0 | 8.0 | – |
| Ep 12 | – | – | 8.0 | – | – |
| Season Avg | 7.9 | 8.2 | 8.9 | 8.0 | 7.9 |
Ratings Analysis & Trajectory
Across 5 seasons and 52 episodes, Sealab 2021 has earned an overall series rating of 8.2 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 2, Episode 2 ("Stimutacs"), rated at an extraordinary 10.0/10 with 2 ratings. Conversely, the lowest-rated installment is Season 5, Episode 6 ("Moby Sick"), landing at 6.0/10.
The most precipitous single-episode shift occurred in Season 3 between Episode 1 ("Brainswitch", 10) and Episode 2 ("Vacation", 6.3), a swing of 3.7 points.
Top 10 Highest Rated Episodes of Sealab 2021
| Rank | Episode | Title | Score | Votes | Air Date |
|---|---|---|---|---|---|
| #1 | Season 2, Ep 2 | Stimutacs | 10.0 | 2 | Apr 28, 2002 |
| #2 | Season 3, Ep 1 | Brainswitch | 10.0 | 2 | May 26, 2003 |
| #3 | Season 3, Ep 3 | Fusebox | 10.0 | 2 | Jun 9, 2003 |
| #4 | Season 3, Ep 7 | Tourist Season | 10.0 | 2 | Nov 30, 2003 |
| #5 | Season 5, Ep 8 | Legacy of Laughter | 10.0 | 1 | Apr 25, 2005 |
| #6 | Season 2, Ep 7 | Bizzaro | 9.5 | 2 | Nov 17, 2002 |
| #7 | Season 3, Ep 4 | Article 4 | 9.5 | 2 | Jun 16, 2003 |
| #8 | Season 3, Ep 5 | Return to Oblivion | 9.5 | 2 | Nov 16, 2003 |
| #9 | Season 3, Ep 6 | Splitsville | 9.5 | 2 | Nov 23, 2003 |
| #10 | Season 3, Ep 8 | Red Dawn | 9.5 | 2 | Dec 7, 2003 |