| Name | First Aired | Runtime | Image | |
|---|---|---|---|---|
| S04E01 | Episode 1 |
February 3, 2017
National Geographic
|
30 | |
| S04E02 | Episode 2 |
February 3, 2017
National Geographic
|
30 | |
| S04E03 | Episode 3 |
February 10, 2017
National Geographic
|
30 | |
| S04E04 | Episode 4 |
February 10, 2017
National Geographic
|
30 | |
| S04E05 | Episode 5 |
February 17, 2017
National Geographic
|
30 | |
| S04E06 | Episode 6 |
February 17, 2017
National Geographic
|
30 | |
| S04E07 | Episode 7 |
February 24, 2017
National Geographic
|
30 | |
| S04E08 | Episode 8 |
February 24, 2017
National Geographic
|
30 | |
| S04E09 | Episode 9 |
March 3, 2017
National Geographic
|
30 | |
| S04E10 | Episode 10 |
March 3, 2017
National Geographic
|
30 | |
| S04E11 | Episode 11 |
March 10, 2017
National Geographic
|
30 | |
| S04E12 | Episode 12 |
March 10, 2017
National Geographic
|
30 | |
| S04E13 | Episode 13 |
March 17, 2017
National Geographic
|
30 | |
| S04E14 |
Episode 14
season finale
|
March 17, 2017
National Geographic
|
30 |
No artwork of this type.
No artwork of this type.
No artwork of this type.