Season 4 Episodes8
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7.0
The Earth Next Door
7.0/10 · 28 votesSep 20, 201660 min
Ranked #5 of 8 in Season 4•matches the season avg
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.
Seasons6
Episode Summary
"The Earth Next Door" is episode 4 of NASA's Unexplained Files season 4. It scored 7.0/10 from 28 votes, ranking #5 of 8 episodes this season (season average 7.0). It aired on September 20, 2016.