NASA's Unexplained Files - Season 4
| 1 |  |
Pluto's Stranger Things 30-08-2016 | |
| 2 |  |
Rise of the Planet Killer 06-09-2016 | |
| 3 |  |
A President's Close Encounter 13-09-2016 | |
| 4 |  |
The Earth Next Door 20-09-2016 | |
| 5 |  |
Curse of the Full Moon 27-09-2016 | |
| 6 |  |
Did Earth Have Two Moons? 04-10-2016 | |
| 7 |  |
Mystery of the Invisible Planet 11-10-2016 | |
| 8 |  |
Mars's Deepest Secret 18-10-2016 |
