NASA's Unexplained Files
S4 E5
5/23/19
Planet of the Metal Aliens
Experts investigate if a nearby exoplanet could be the home to an alien civilization of strange, metallic monsters after a new discovery confirms that life can thrive on such a strange world.
Seasons
Episode
1
Pluto's Evil Twin
Episode
2
The Black Hole Next Door
Episode
3
Aliens vs. Stalin at Area 51
Episode
5
Planet of the Metal Aliens
Episode
7
Aliens in the Amazon
Episode
8