| No. | Title | Produced by | Original air date | UK viewers (millions) |
|---|---|---|---|---|
| 1 | "The Hardest Challenge" | Huw Cordey | 1 November 2015 | 5.80 |
| Mediafire - 4shared | ||||
| 2 | "In the Grip of the Seasons (Arctic)" | Jonnie Hughes | 8 November 2015 | 5.71 |
| Mediafire - 4shared | ||||
| 3 | "Hide and Seek (Forests)" | Jonnie Hughes | 15 November 2015 | 4.87 |
| Mediafire - 4shared | ||||
| 4 | "Hunger at Sea (Oceans)" | Hugh Pearson | 22 November 2015 | 5.00 |
| Mediafire - 4shared | ||||
| 5 | "Nowhere to Hide (Plains)" | Ellen Husain | 29 November 2015 | 4.72 |
| Mediafire - 4shared | ||||
| 6 | "Race Against Time (Coasts)" | Hugh Pearson | 6 December 2015 | 4.86 |
| Mediafire - 4shared | ||||
| 7 | "Living with Predators (Conservation)" | Rob Sullivan | 13 December 2015 | 4.54 |
| Mediafire - 4shared | ||||
Vietsub
