Castle Episode Ratings Heatmap
2009 · 5 Seasons · 105 Episodes · Overall Score: 7.3/10 (10 rated)
Season 1 holds the highest collective average score across the series.
Season 1 Details →Lowest score variance (σ = 0.26), maintaining an average of 7.3.
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 | 7.5 | – | – | – | – |
| Ep 2 | 7.4 | – | – | – | – |
| Ep 3 | 7.1 | – | – | – | – |
| Ep 4 | 7.2 | – | – | – | – |
| Ep 5 | 7.3 | – | – | – | – |
| Ep 6 | 6.7 | – | – | – | – |
| Ep 7 | 7.3 | – | – | – | – |
| Ep 8 | 7.5 | – | – | – | – |
| Ep 9 | 7.3 | – | – | – | – |
| Ep 10 | 7.6 | – | – | – | – |
| Ep 11 | – | – | – | – | – |
| Ep 12 | – | – | – | – | – |
| Ep 13 | – | – | – | – | – |
| Ep 14 | – | – | – | – | – |
| Ep 15 | – | – | – | – | – |
| Ep 16 | – | – | – | – | – |
| Ep 17 | – | – | – | – | – |
| Ep 18 | – | – | – | – | – |
| Ep 19 | – | – | – | – | – |
| Ep 20 | – | – | – | – | – |
| Ep 21 | – | – | – | – | – |
| Ep 22 | – | – | – | – | – |
| Ep 23 | – | – | – | – | – |
| Ep 24 | – | – | – | – | – |
| Season Avg | 7.3 | – | – | – | – |
Ratings Analysis & Trajectory
Across 5 seasons and 105 episodes, Castle has earned an overall series rating of 7.3 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 10 ("A Death in the Family"), rated at an extraordinary 7.6/10 with 26 ratings. Conversely, the lowest-rated installment is Season 1, Episode 6 ("Always Buy Retail"), landing at 6.7/10.
The most precipitous single-episode shift occurred in Season 1 between Episode 5 ("A Chill Goes Through Her Veins", 7.3) and Episode 6 ("Always Buy Retail", 6.7), a swing of 0.6 points.
Top 10 Highest Rated Episodes of Castle
| Rank | Episode | Title | Score | Votes | Air Date |
|---|---|---|---|---|---|
| #1 | Season 1, Ep 10 | A Death in the Family | 7.6 | 26 | May 11, 2009 |
| #2 | Season 1, Ep 1 | Flowers for Your Grave | 7.5 | 38 | Mar 9, 2009 |
| #3 | Season 1, Ep 8 | Ghosts | 7.5 | 26 | Apr 27, 2009 |
| #4 | Season 1, Ep 2 | Nanny McDead | 7.4 | 33 | Mar 16, 2009 |
| #5 | Season 1, Ep 7 | Home Is Where the Heart Stops | 7.3 | 26 | Apr 20, 2009 |
| #6 | Season 1, Ep 5 | A Chill Goes Through Her Veins | 7.3 | 25 | Apr 6, 2009 |
| #7 | Season 1, Ep 9 | Little Girl Lost | 7.3 | 25 | May 4, 2009 |
| #8 | Season 1, Ep 4 | Hell Hath No Fury | 7.2 | 27 | Mar 30, 2009 |
| #9 | Season 1, Ep 3 | Hedge Fund Homeboys | 7.1 | 29 | Mar 23, 2009 |
| #10 | Season 1, Ep 6 | Always Buy Retail | 6.7 | 28 | Apr 13, 2009 |