Season 15 holds the highest collective average score across the series.
Season 15 Details →Lowest score variance (σ = 0.58), maintaining an average of 8.5.
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 | Season 6 | Season 7 | Season 8 | Season 9 | Season 10 | Season 11 | Season 12 | Season 13 | Season 14 | Season 15 | Season 16 | Season 17 | Season 18 | Season 19 | Season 20 | Season 21 | Season 22 | Season 23 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ep 1 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 10.0 | – | 9.0 | – | – | 1.0 | – | – | – |
| Ep 2 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |
| Ep 3 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 9.0 | – | – | – | – | – | – |
| Ep 4 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |
| Ep 5 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 8.0 | – | – | – | – | 7.0 | – |
| Ep 6 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |
| Ep 7 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 8.0 | – | – | – | – | – | – |
| Ep 8 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |
| Ep 9 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |
| Ep 10 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |
| Season Avg | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 10.0 | – | 8.5 | – | – | 1.0 | – | 7.0 | – |
Ratings Analysis & Trajectory
Across 23 seasons and 123 episodes, Secrets of the Dead has earned an overall series rating of 7.4 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 15, Episode 1 ("Vampire Legend"), rated at an extraordinary 10.0/10 with 1 ratings. Conversely, the lowest-rated installment is Season 20, Episode 1 ("Archaeology at Althorp"), landing at 1.0/10.
Top 10 Highest Rated Episodes of Secrets of the Dead
| Rank | Episode | Title | Score | Votes | Air Date |
|---|---|---|---|---|---|
| #1 | Season 15, Ep 1 | Vampire Legend | 10.0 | 1 | Oct 27, 2015 |
| #2 | Season 17, Ep 1 | Scanning the Pyramids | 9.0 | 1 | Jan 24, 2018 |
| #3 | Season 17, Ep 3 | The Woman in the Iron Coffin | 9.0 | 1 | Oct 3, 2018 |
| #4 | Season 17, Ep 5 | King Arthur's Lost Kingdom | 8.0 | 1 | Mar 27, 2019 |
| #5 | Season 17, Ep 7 | World War Speed | 8.0 | 1 | Jun 25, 2019 |
| #6 | Season 22, Ep 5 | Plunderer: The Life and Times of a Nazi Art Thief (Part One) | 7.0 | 1 | Feb 19, 2025 |
| #7 | Season 20, Ep 1 | Archaeology at Althorp | 1.0 | 2 | Oct 9, 2022 |