The investigation was conducted Episode Ratings Heatmap
2006 · 21 Seasons · 709 Episodes · Overall Score: 7.8/10 (692 rated)
Season 20 holds the highest collective average score across the series.
Season 20 Details →Lowest score variance (σ = 0), maintaining an average of 7.0.
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 21 seasons and 709 episodes, The investigation was conducted has earned an overall series rating of 7.8 out of 10. The series demonstrates an upward quality trajectory, with later seasons sustaining higher viewer acclaim than its debut.
The single highest-rated hour of television in the series is Season 3, Episode 16 ("Episode 16"), rated at an extraordinary 10.0/10 with 1 ratings. Conversely, the lowest-rated installment is Season 2, Episode 5 ("Episode 37"), landing at 3.0/10.
The most precipitous single-episode shift occurred in Season 2 between Episode 4 ("Episode 36", 7) and Episode 5 ("Episode 37", 3), a swing of 4 points.
Top 10 Highest Rated Episodes of The investigation was conducted
| Rank | Episode | Title | Score | Votes | Air Date |
|---|---|---|---|---|---|
| #1 | Season 3, Ep 16 | Episode 16 | 10.0 | 1 | May 30, 2008 |
| #2 | Season 1, Ep 27 | Episode 27 | 9.0 | 1 | Nov 17, 2006 |
| #3 | Season 1, Ep 28 | Episode 28 | 9.0 | 1 | Nov 24, 2006 |
| #4 | Season 1, Ep 29 | Episode 29 | 9.0 | 1 | Dec 8, 2006 |
| #5 | Season 1, Ep 30 | Episode 30 | 9.0 | 1 | Dec 15, 2006 |
| #6 | Season 11, Ep 1 | Episode 1 | 9.0 | 1 | Feb 7, 2016 |
| #7 | Season 20, Ep 1 | Episode 1 | 9.0 | 1 | Feb 1, 2025 |
| #8 | Season 20, Ep 2 | Episode 2 | 9.0 | 1 | Feb 8, 2025 |
| #9 | Season 20, Ep 3 | Episode 3 | 9.0 | 1 | Feb 15, 2025 |
| #10 | Season 20, Ep 4 | Episode 4 | 9.0 | 1 | Feb 22, 2025 |