Secrecy of the Investigation Episode Ratings Heatmap
2000 · 25 Seasons · 428 Episodes · Overall Score: 8.4/10 (428 rated)
Season 9 holds the highest collective average score across the series.
Season 9 Details →Lowest score variance (σ = 0), maintaining an average of 9.5.
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 25 seasons and 428 episodes, Secrecy of the Investigation has earned an overall series rating of 8.4 out of 10. The series reached its critical peak early, showing a slight contraction in audience satisfaction in later chapters.
The single highest-rated hour of television in the series is Season 9, Episode 24 ("Episode 24"), rated at an extraordinary 10.0/10 with 2 ratings. Conversely, the lowest-rated installment is Season 12, Episode 11 ("Episode 11"), landing at 7.0/10.
The most precipitous single-episode shift occurred in Season 3 between Episode 5 ("Episode 5", 9) and Episode 6 ("Episode 6", 7.5), a swing of 1.5 points.
Top 10 Highest Rated Episodes of Secrecy of the Investigation
| Rank | Episode | Title | Score | Votes | Air Date |
|---|---|---|---|---|---|
| #1 | Season 9, Ep 24 | Episode 24 | 10.0 | 2 | Nov 8, 2011 |
| #2 | Season 1, Ep 1 | Episode 1 | 9.5 | 2 | Sep 1, 2000 |
| #3 | Season 1, Ep 2 | Episode 2 | 9.5 | 2 | Sep 1, 2000 |
| #4 | Season 1, Ep 4 | Episode 4 | 9.5 | 2 | Sep 1, 2000 |
| #5 | Season 1, Ep 5 | Episode 5 | 9.5 | 2 | Nov 5, 2001 |
| #6 | Season 1, Ep 6 | Episode 6 | 9.5 | 2 | Nov 5, 2001 |
| #7 | Season 1, Ep 7 | Episode 7 | 9.5 | 2 | Nov 5, 2001 |
| #8 | Season 1, Ep 9 | Episode 9 | 9.5 | 2 | Nov 8, 2001 |
| #9 | Season 1, Ep 10 | Episode 10 | 9.5 | 2 | Nov 8, 2001 |
| #10 | Season 1, Ep 11 | Episode 11 | 9.5 | 2 | Nov 10, 2001 |