NASA's Unexplained Files Season 4 Episode 4
The Earth Next Door
Astronomers detect a potentially habitable planet tantalizingly close to Earth. A chance discovery at NASA reveals a top secret military space program. The Apollo missions bring back evidence that the moon may be rich in the building blocks for life.
4 - 8Mars's Deepest SecretOct. 18, 2016- 4 - 7Mystery of the Invisible PlanetOct. 11, 2016
- 4 - 6Did Earth Have Two Moons?Oct. 04, 2016
- 4 - 5Curse of the Full MoonSep. 27, 2016
- 4 - 4The Earth Next DoorSep. 20, 2016
- 4 - 3A President's Close EncounterSep. 13, 2016
- 4 - 2Rise of the Planet KillerSep. 06, 2016
- 4 - 1Pluto's Stranger ThingsAug. 30, 2016
