Season 8 (2015)
6.86 avg 8 episodes 7.7 → 7.0 43 min avg
| # | Title | Rating | Votes |
|---|---|---|---|
| 1 | Warlords of Ivory | 7.7 | 9 |
| 2 | Legend of the Monkey God | 6.5 | 12 |
| 3 | Bill Nye's Global Meltdown | 7.7 | 38 |
| 4 | The Cult of Mary | 5.6 | 10 |
| 5 | Call of the Wild | 6.4 | 6 |
| 7 | Fighting ISIS | 7.8 | 14 |
| 10 | Blood Antiquities | 6.2 | 6 |
| 11 | Battle for Virunga | 7.0 | 7 |
