The BEST episodes of NASA's Unexplained Files season 5
Every episode of NASA's Unexplained Files season 5, ranked from best to worst by thousands of votes from fans of the show. The best episodes of NASA's Unexplained Files season 5!
Strange flying objects have been caught on NASA's cameras and astronauts have reported seeing UFOs. Some of the odd shapes and lights can be identified; others remain a mystery. We'll reveal NASA footage and interview the astronauts and scientists.
#1 - Stonehenge on Mars
Season 5 - Episode 5 - Aired 5/10/2017
When NASA spots a something on Mars that resembles Stonehenge, they investigate what could have made this strange structure. Scientists discover a mysterious hole in Saturn's rings. An ancient tribe claims contact with alien visitors.
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#2 - Secret Aliens
Season 5 - Episode 4 - Aired 5/3/2017
An astronomer records an unusual radio signal from beyond our solar system. FBI agents find classified documents at the home of a NASA scientist. When scientists discover strange DNA in the octopus, they examine if their origins could be alien.
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#3 - The Moon's Strange Secret
Season 5 - Episode 7 - Aired 2/3/2018
The last humans to walk on the Moon discover something strange on the surface. A NASA scientist investigates a strange phenomenon responsible for horrific mass deaths. A landmark NASA mission threatens to destroy the reputation of an American hero.
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#4 - CIA's Secret Revenge
Season 5 - Episode 6 - Aired 1/27/2018
When the Soviet Union unveils its own space shuttle, the CIA hatches a secret revenge plot. Recent discoveries shed new light on the destruction of Sodom and Gomorrah. A missing nuclear weapon could threaten a NASA base in the Arctic.
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#5 - JFK UFO Conspiracy
Season 5 - Episode 1 - Aired 4/12/2017
A declassified letter written by President Kennedy demands the CIA share its UFO data with NASA. A bizarre pattern on the surface of Mars could be a coded alien message. Investigators are shocked to find a rocket crash-landed in a crater on the Moon.
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#8 - Saturn's Death Star
Season 5 - Episode 8 - Aired 2/10/2018
A mysterious object is orbiting Saturn, and it looks just like the Death Star. New evidence might shed new light on the mysterious death of Yuri Gagarin, the first man in space. When a cuting-edge satellite vanishes, fears of a space war escalate.
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