NASA's Unexplained Files
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Where to Watch NASA's Unexplained Files
Where to stream every episode from all 5 seasons of NASA's Unexplained Files. Filter these episodes by what's available to watch free or on your streaming services using the tabs above.
Season 1Destination Unknown | Science | Rent or Buy
S01 E01Mar 3, 2014
Pilot Mar 3, 2014 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.
S01 E02Mar 7, 2014
Shadow Deathstar Mar 7, 2014 Astronaut Leroy Chao’s spacewalk is interrupted by bright lights flying past. A flying saucer photographed from the Apollo capsule, dark shapes caught on camera shadowing the shuttle. The ideas are science fiction, but the incidents are science fact.
S01 E03Mar 12, 2014
Alien Death Ray Mar 12, 2014 The Viking Lander may have found life on Mars, so why don’t we know about it? What is the most destructive force in the universe? How could a Starship be spotted in the Aurora Borealis? And what are NASA’s mysterious Moon Pigeons?
S01 E04Mar 19, 2014
Black Knight Rises Mar 19, 2014 A chunk of the sun appears to have vanished. An ominous dark craft beneath the Shuttle Endeavour. Hubble spots thousands of unidentified objects traveling faster than light. Are we being watched? Or could we ourselves be aliens from another world?
S01 E05Jul 21, 2014
Episode 5 Jul 21, 2014 Could spaceships be powered by atomic bombs? Can artificial rings encircle an entire star? why was Neil Armstrong's transmission feed cut off when he spotted strange lights on the Moon? And how can lightning talk to itself?
S01 E06Jul 25, 2014
Episode 6 Jul 25, 2014 What could make a NASA astronaut report seeing a flying saucer in the skies above a US Air Force test range? How have the swirling gases of Saturn formed a perfect Hexagon that has hovered above the planet's pole for 30 years?
Season 2Destination Unknown | Science | Rent or Buy
S02 E01Mar 3, 2015
Life in Hell Mar 3, 2015 A UFO crashes in Pennsylvania. Was it a secret Soviet satellite or something far more dangerous? On Mercury, NASA finds the impossible: frozen water. A strange object causes a skyscraper-sized shadow on the surface of Mars's largest moon. What is it?
S02 E02Mar 5, 2015
Top Secret Terror Mar 5, 2015 Was the Moon landing faked? Images of Mercury reveal massive spider-like formations on its surface. Is it an odd geological formation or something much more ominous? A classified space shuttle mission ends in near-disaster. What was its mission?
S02 E03Apr 23, 2014
Hammer of Thor Apr 23, 2014 Are burning lights in the skies above Nevada & Utah signs of a secret space weapons project? What are the mysterious trails on the lunar surface near the Apollo landing sites? Does a strange space object spell disaster for the space shuttle crew?
S02 E04Apr 30, 2015
Spacewalk of Doom Apr 30, 2015 An astronaut on a spacewalk begins to drown. How could this terrifying event happen? Have NASA scientists discovered an asteroid that was converted into a spacecraft? What are the strange objects spotted when NASA sends a secret payload into space?
S02 E05May 7, 2015
Black Knight Rises May 7, 2015 Could NASA really be responsible for a nuclear explosion on Jupiter? Could new evidence finally reveal the truth behind the mystery of the iconic face on Mars? What unknown force crashed a spacecraft from the Apollo program into the lunar surface?
S02 E06May 14, 2015
Nazis on the Moon May 14, 2015 A Russian probe discovers something has disturbed the lunar soil before the US or USSR got there. Did Nazis arrive first? Have scientists detected a laser signal from a planet capable of supporting life? Is there really a Bermuda Triangle of Space?
Season 3Destination Unknown | Science | Rent or Buy
S03 E01Feb 24, 2016
Pluto Under Pressure Feb 24, 2016 Lost tapes reveal that Apollo astronauts heard unexplained transmissions on the far side of the moon, an amateur astronomer spots a strange disturbance in Martian atmosphere & an unidentified object in Earth orbit starts stalking Russian spacecraft.
S03 E02Mar 2, 2016
Return of the Moon Bugs Mar 2, 2016 Apollo 12 astronauts bring back something alive from the moon and NASA track an asteroid heading towards Earth but make a shocking discovery: it’s not an asteroid, but an object that’s artificial in nature.
S03 E03Mar 9, 2016
Rise of the Ice Creatures Mar 9, 2016 Neil Armstrong goes into an unexplained spin. He needs to figure out what’s causing it, or he faces certain death. An Apollo 17 photo seems to show a military outpost on the Moon & could there be alien life swimming in the oceans of Jupiter’s moons?
S03 E04Mar 16, 2016
Ghosts on a Comet Mar 16, 2016 When a Chinese moon rover breaks down, a NASA scientist points to a mysterious material that seemed to sabotage the Apollo missions, decades earlier. The Rosetta spacecraft finds a comet that appears to be singing.
S03 E05Mar 23, 2016
The Moon that Disappeared Mar 23, 2016 Recently discovered documents reveal NASA's secret plan B for failure of the first moon landing, a Soyuz capsule carrying astronaut Peggy Whitson back to Earth vanishes without explanation and NASA’s Cassini mission unravels a three hundred year old.
S03 E06Mar 30, 2016
Curse of the Red Planet Mar 30, 2016 Three cosmonauts die mysteriously as they re-enter Earth's atmosphere & NASA needs to know why. A declassified document reveals a CIA plan to use a space disaster as a cover to start war and a NASA rover discovers clues that help solve a murder.
S03 E07Apr 6, 2016
Red Storm Rising Apr 6, 2016 Two astronauts trapped in the vacuum of space face an agonizing death; the first close up images of Pluto reveal an alien landscape, and residents of Houston struggle to explain videos of unidentified flying lights captured above their city at night.
Season 4Destination Unknown | Science | Rent or Buy
S04 E01Aug 31, 2016
Pluto's Stranger Things Aug 31, 2016 Astronomers find evidence for incredible alien technology around a distant star. The first pictures of Pluto show that something might be moving across its surface. Apollo astronauts see something they can't explain as they approach the moon.
S04 E02Sep 7, 2016
Rise of the Planet Killer Sep 7, 2016 A mission to Mars captures an image of a strange structure on the Red Planet. 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.
S04 E03Sep 14, 2016
A President's Close Encounter Sep 14, 2016 Geysers are discovered on a frozen moon, and NASA redirects a probe on a daring mission to detect evidence of life. An unidentified object is spotted approaching a near-earth asteroid. A future US President is an eyewitness to a UFO.
S04 E04Sep 21, 2016
The Earth Next Door Sep 21, 2016 Astronomers detect a potentially habitable planet tantalizingly close to Earth. A chance discovery at NASA reveals a top secret military space program. The Apollo missions bring back evidence that the moon may be rich in the building blocks for life.
S04 E05Sep 28, 2016
Curse of the Full Moon Sep 28, 2016 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.
S04 E06Oct 5, 2016
Did Earth Have Two Moons? Oct 5, 2016 A startling discovery suggests that the hellish clouds of Venus may be the origin of life on Earth. A bizarre sighting 2,000 years ago raises the possibility that Earth once had two moons. A scientist helps the FBI crack the 1996 Olympic bombing.
S04 E07Oct 12, 2016
Mystery of the Invisible Planet Oct 12, 2016 A probe carrying a message to aliens mysteriously malfunctions as it enters deep space. A NASA mission goes disastrously wrong when an imposter breaches Mission Control. Astronomers find evidence of an invisible planet in a distant solar system.
Season 5Destination Unknown | Science | Rent or Buy
S05 E01Aug 30, 2016
Pluto's Stranger Things Aug 30, 2016 Evidence of alien technology around a distant star; speculation about Pluto's surface; Apollo astronauts are at a loss of words to describe an object they encountered while they approached the moon.
S05 E01Apr 13, 2017
JFK UFO Conspiracy Apr 13, 2017 A declassified letter written by President Kennedy demands that the CIA share its UFO data with NASA; a pattern on the surface of Mars could be a coded alien message; and investigators are shocked to find a rocket crash-landed in a crater on the moon.
S05 E02Apr 20, 2017
Curse of the Gas Giant Apr 20, 2017 Jupiter is far hotter than it should be, and scientists don't understand why; the Curiosity Rover finds something strange on Mars; and detectives turn to NASA for help with a murder cold case.
S05 E03Apr 27, 2017
The Sun's Evil Twin Apr 27, 2017 Two suns are photographed in the sky over Indonesia; NASA scientists are baffled by ghostly white swirls on the moon's surface; an astronaut disappears during his return to Earth.
S05 E04May 4, 2017
Secret Aliens May 4, 2017 An astronomer records an unusual radio signal from beyond the 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.
S05 E05May 11, 2017
Stonehenge on Mars May 11, 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.