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.

Genre:

Documentary, Talk, Mystery

Seasons:

6

Episodes:

47

Quality:

HD

Status:

Returning Series

First Air:

2012

IMDb:

7.1