Cosmos Episode Ratings Heatmap
2014 · 2 Seasons · 26 Episodes · Overall Score: 8.4/10 (13 rated)
Season 1 holds the highest collective average score across the series.
Season 1 Details →Lowest score variance (σ = 0.14), maintaining an average of 8.4.
Complete Episode Rating Matrix
Interactive score chart by season and episode number. Darker green indicates higher ratings; amber and red denote lower reception.
Ratings Analysis & Trajectory
Across 2 seasons and 26 episodes, Cosmos has earned an overall series rating of 8.4 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 13 ("Unafraid of the Dark"), rated at an extraordinary 8.7/10 with 25 ratings. Conversely, the lowest-rated installment is Season 1, Episode 9 ("The Lost Worlds of Planet Earth"), landing at 8.1/10.
The most precipitous single-episode shift occurred in Season 1 between Episode 8 ("Sisters of the Sun", 8.3) and Episode 9 ("The Lost Worlds of Planet Earth", 8.1), a swing of 0.2 points.
Top 10 Highest Rated Episodes of Cosmos
| Rank | Episode | Title | Score | Votes | Air Date |
|---|---|---|---|---|---|
| #1 | Season 1, Ep 13 | Unafraid of the Dark | 8.7 | 25 | Jun 8, 2014 |
| #2 | Season 1, Ep 1 | Standing Up in the Milky Way | 8.5 | 49 | Mar 9, 2014 |
| #3 | Season 1, Ep 10 | The Electric Boy | 8.5 | 24 | May 11, 2014 |
| #4 | Season 1, Ep 2 | Some of the Things that Molecules Do | 8.4 | 44 | Mar 16, 2014 |
| #5 | Season 1, Ep 3 | When Knowledge Conquered Fear | 8.4 | 37 | Mar 23, 2014 |
| #6 | Season 1, Ep 5 | Hiding in the Light | 8.4 | 35 | Apr 6, 2014 |
| #7 | Season 1, Ep 4 | A Sky Full of Ghosts | 8.4 | 34 | Mar 30, 2014 |
| #8 | Season 1, Ep 6 | Deeper, Deeper, Deeper Still | 8.3 | 31 | Apr 13, 2014 |
| #9 | Season 1, Ep 7 | The Clean Room | 8.3 | 25 | Apr 20, 2014 |
| #10 | Season 1, Ep 8 | Sisters of the Sun | 8.3 | 24 | Apr 27, 2014 |