When did NASA's Unexplained Files Season 4 Episode 2 air?
NASA's Unexplained Files Season 4 Episode 2 aired on September 6, 2016.


Dive into the mysteries of some of NASA’s most curious missions and explore stories of engineering achievement and human endurance. Each episode offers first hand testimony from astronauts, NASA mission footage, plus beautifully rendered CGI to bring to life these voyages that reveal unexplained sightings that have dogged many of NASA’s most famous missions.

A probe captures an image of a strange structure on Mars. Files from the first Apollo mission record an eerie sighting on the dark side of the Moon. A planet-eating star gives scientists a glimpse of Earth's terrible demise.
Direct answers for episode-level questions and details.
NASA's Unexplained Files Season 4 Episode 2 aired on September 6, 2016.
This episode runs for approximately 60 minutes.
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