NASA's Unexplained Files

1. 

   E1. Saturn's Moon Monsters

   Apr 11, 2019 · 60m

   When NASA discovers something strange on Saturn's biggest moon, experts investigate if aliens feeding on the electric atmosphere could be the culprit. The disturbing evidence points to a grisly apocalypse if these monsters ever make it to Earth.

2. 

   E2. Aliens vs. Stalin at Area 51

   Apr 18, 2019 · 60m

   When a former Area 51 insider alleges that the Roswell UFO incident was a nefarious Soviet conspiracy masterminded by Stalin, experts investigate if it was indeed an enemy plot against America -- or if the confession is just another cover-up.

3. 

   E3. The Black Hole Next Door

   Apr 25, 2019 · 60m

   When astronomers discover a rogue black hole speeding through the Milky Way, they investigate how much danger this cosmic monster poses to Earth, and what would happen if it ever entered our solar system.

4. 

   E4. Pluto's Evil Twin

   May 2, 2019

   After NASA's New Horizons spacecraft flies by Pluto, it encounters a strange alien world that shuts down the probe's computers, and experts investigate if this mysterious object is an alien spacecraft hiding at the edge of our solar system.

5. 

   E5. Aliens in the Amazon

   May 9, 2019

   After Neil Armstrong's moonwalk, he led an expedition to the Amazon to find a legendary library that holds all knowledge of an advanced alien civilization. Experts ask if a close encounter on the moon's surface inspired Armstrong's mysterious quest.

6. 

   E6. Secrets of the Alien Signals

   May 16, 2019

   When NASA begins a strange experiment to communicate with dolphins, experts investigate if it's a prelude to making alien contact. But some fear that such a discovery could have apocalyptic consequences.

+2 more episodes — open all seasons to browse every episode.