When did NASA's Unexplained Files Season 4 Episode 5 air?
NASA's Unexplained Files Season 4 Episode 5 aired on September 27, 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.

Two cosmonauts fight for their lives while trapped inside a capsule in a frozen lake. A NASA scientist investigates the deadly Nazi secret that doomed the Hindenburg. NASA astronomers are spooked when the full moon starts affecting their experiments.
Direct answers for episode-level questions and details.
NASA's Unexplained Files Season 4 Episode 5 aired on September 27, 2016.
This episode runs for approximately 60 minutes.
Comments coming soon
Discuss episodes with other viewers