The Big Bang Theory Episode Ratings Heatmap
2007 · 5 Seasons · 111 Episodes · Overall Score: 7.6/10 (17 rated)
Season 1 holds the highest collective average score across the series.
Season 1 Details →Lowest score variance (σ = 0.19), 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 | 7.4 | – | – | – | – |
| Ep 2 | 7.5 | – | – | – | – |
| Ep 3 | 7.1 | – | – | – | – |
| Ep 4 | 7.6 | – | – | – | – |
| Ep 5 | 7.6 | – | – | – | – |
| Ep 6 | 7.6 | – | – | – | – |
| Ep 7 | 7.8 | – | – | – | – |
| Ep 8 | 7.5 | – | – | – | – |
| Ep 9 | 7.7 | – | – | – | – |
| Ep 10 | 7.5 | – | – | – | – |
| Ep 11 | 7.7 | – | – | – | – |
| Ep 12 | 7.3 | – | – | – | – |
| Ep 13 | 7.7 | – | – | – | – |
| Ep 14 | 7.5 | – | – | – | – |
| Ep 15 | 7.5 | – | – | – | – |
| Ep 16 | 7.6 | – | – | – | – |
| Ep 17 | 7.9 | – | – | – | – |
| Ep 18 | – | – | – | – | – |
| Ep 19 | – | – | – | – | – |
| Ep 20 | – | – | – | – | – |
| Ep 21 | – | – | – | – | – |
| Ep 22 | – | – | – | – | – |
| Ep 23 | – | – | – | – | – |
| Ep 24 | – | – | – | – | – |
| Season Avg | 7.6 | – | – | – | – |
Ratings Analysis & Trajectory
Across 5 seasons and 111 episodes, The Big Bang Theory 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 17 ("The Tangerine Factor"), rated at an extraordinary 7.9/10 with 64 ratings. Conversely, the lowest-rated installment is Season 1, Episode 3 ("The Fuzzy Boots Corollary"), landing at 7.1/10.
The most precipitous single-episode shift occurred in Season 1 between Episode 2 ("The Big Bran Hypothesis", 7.5) and Episode 3 ("The Fuzzy Boots Corollary", 7.1), a swing of 0.4 points.
Top 10 Highest Rated Episodes of The Big Bang Theory
| Rank | Episode | Title | Score | Votes | Air Date |
|---|---|---|---|---|---|
| #1 | Season 1, Ep 17 | The Tangerine Factor | 7.9 | 64 | May 19, 2008 |
| #2 | Season 1, Ep 7 | The Dumpling Paradox | 7.8 | 70 | Nov 5, 2007 |
| #3 | Season 1, Ep 11 | The Pancake Batter Anomaly | 7.7 | 66 | Mar 31, 2008 |
| #4 | Season 1, Ep 9 | The Cooper-Hofstadter Polarization | 7.7 | 63 | Mar 17, 2008 |
| #5 | Season 1, Ep 13 | The Bat Jar Conjecture | 7.7 | 63 | Apr 21, 2008 |
| #6 | Season 1, Ep 4 | The Luminous Fish Effect | 7.6 | 82 | Oct 15, 2007 |
| #7 | Season 1, Ep 5 | The Hamburger Postulate | 7.6 | 76 | Oct 22, 2007 |
| #8 | Season 1, Ep 6 | The Middle-Earth Paradigm | 7.6 | 72 | Oct 29, 2007 |
| #9 | Season 1, Ep 16 | The Peanut Reaction | 7.6 | 63 | May 12, 2008 |
| #10 | Season 1, Ep 2 | The Big Bran Hypothesis | 7.5 | 96 | Oct 1, 2007 |