The Flash Episode Ratings Heatmap
2014 · 5 Seasons · 114 Episodes · Overall Score: 7.6/10 (23 rated)
Season 1 holds the highest collective average score across the series.
Season 1 Details →Lowest score variance (σ = 0.48), maintaining an average of 7.6.
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 | 6.9 | – | – | – | – |
| Ep 2 | 6.9 | – | – | – | – |
| Ep 3 | 7.1 | – | – | – | – |
| Ep 4 | 7.3 | – | – | – | – |
| Ep 5 | 7.2 | – | – | – | – |
| Ep 6 | 7.4 | – | – | – | – |
| Ep 7 | 7.4 | – | – | – | – |
| Ep 8 | 8.0 | – | – | – | – |
| Ep 9 | 8.1 | – | – | – | – |
| Ep 10 | 7.2 | – | – | – | – |
| Ep 11 | 7.2 | – | – | – | – |
| Ep 12 | 7.4 | – | – | – | – |
| Ep 13 | 7.4 | – | – | – | – |
| Ep 14 | 7.8 | – | – | – | – |
| Ep 15 | 8.3 | – | – | – | – |
| Ep 16 | 7.3 | – | – | – | – |
| Ep 17 | 8.0 | – | – | – | – |
| Ep 18 | 7.6 | – | – | – | – |
| Ep 19 | 8.1 | – | – | – | – |
| Ep 20 | 8.2 | – | – | – | – |
| Ep 21 | 7.5 | – | – | – | – |
| Ep 22 | 8.2 | – | – | – | – |
| Ep 23 | 8.6 | – | – | – | – |
| Season Avg | 7.6 | – | – | – | – |
Ratings Analysis & Trajectory
Across 5 seasons and 114 episodes, The Flash has earned an overall series rating of 7.6 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 23 ("Fast Enough"), rated at an extraordinary 8.6/10 with 60 ratings. Conversely, the lowest-rated installment is Season 1, Episode 2 ("Fastest Man Alive"), landing at 6.9/10.
The most precipitous single-episode shift occurred in Season 1 between Episode 15 ("Out of Time", 8.3) and Episode 16 ("Rogue Time", 7.3), a swing of 1 points.
Top 10 Highest Rated Episodes of The Flash
| Rank | Episode | Title | Score | Votes | Air Date |
|---|---|---|---|---|---|
| #1 | Season 1, Ep 23 | Fast Enough | 8.6 | 60 | May 19, 2015 |
| #2 | Season 1, Ep 15 | Out of Time | 8.3 | 67 | Mar 17, 2015 |
| #3 | Season 1, Ep 20 | The Trap | 8.2 | 59 | Apr 28, 2015 |
| #4 | Season 1, Ep 22 | Rogue Air | 8.2 | 58 | May 12, 2015 |
| #5 | Season 1, Ep 9 | The Man in the Yellow Suit | 8.1 | 62 | Dec 9, 2014 |
| #6 | Season 1, Ep 19 | Who Is Harrison Wells? | 8.1 | 58 | Apr 21, 2015 |
| #7 | Season 1, Ep 8 | Flash vs. Arrow (I) | 8.0 | 64 | Dec 2, 2014 |
| #8 | Season 1, Ep 17 | Tricksters | 8.0 | 59 | Mar 31, 2015 |
| #9 | Season 1, Ep 14 | Fallout | 7.8 | 54 | Feb 17, 2015 |
| #10 | Season 1, Ep 18 | All Star Team Up | 7.6 | 59 | Apr 14, 2015 |