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The Best Episodes of NASA's Unexplained Files

Every episode of NASA's Unexplained Files ranked from best to worst. Let's dive into the Best Episodes of NASA's Unexplained Files!

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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

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Episode Rankings

  1. #1 Fan Favorite
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    NASA's Unexplained Files Season 5 Episode 3 - The Sun's Evil Twin
    7.8/10(17 votes)

    S5:E3

    Two suns are photographed in the Indonesia sky -- a trick of the light or a sighting of our Sun's evil twin? Scientists are baffled by ghostly swirls on the Moon's surface. An astronaut disappears during his return to Earth.

    Director:Unknown
    Writer:Unknown

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  2. NASA's Unexplained Files Season 5 Episode 6 - CIA's Secret Revenge
    7.7/10(19 votes)

    S5:E6

    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.

    Director:Unknown
    Writer:Unknown

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  3. NASA's Unexplained Files Season 6 Episode 2 - Aliens vs. Stalin at Area 51
    7.7/10(25 votes)

    S6:E2

    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.

    Director:Unknown
    Writer:Unknown

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  4. NASA's Unexplained Files Season 3 Episode 6 - Curse of the Red Planet
    7.6/10(34 votes)

    S3:E6

    Three cosmonauts die mysteriously as they re-enter Earth's atmosphere. 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.

    Director:Unknown
    Writer:Unknown

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  5. NASA's Unexplained Files Season 3 Episode 7 - Red Storm Rising
    7.5/10(30 votes)

    S3:E7

    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.

    Director:Unknown
    Writer:Unknown

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  6. NASA's Unexplained Files Season 5 Episode 1 - JFK UFO Conspiracy
    7.5/10(28 votes)

    S5:E1

    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.

    Director:Unknown
    Writer:Unknown

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    The 20 WORST Episodes of NASA's Unexplained Files

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  7. NASA's Unexplained Files Season 5 Episode 4 - Secret Aliens
    7.5/10(17 votes)

    S5:E4

    An astronomer records an unusual signal from a distant star. 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.

    Director:Unknown
    Writer:Unknown

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  8. NASA's Unexplained Files Season 5 Episode 7 - The Moon's Strange Secret
    7.5/10(20 votes)

    S5:E7

    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.

    Director:Unknown
    Writer:Unknown

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  9. NASA's Unexplained Files Season 6 Episode 8 - Did Aliens Nuke Mars?
    7.4/10(21 votes)

    S6:E8

    A strange discovery by NASA's Mars Curiosity rover suggests the Red Planet was home to an alien nuclear war 300 million years ago. Experts investigate if an extraterrestrial Armageddon transformed an earth-like world into the wasteland we know today.

    Director:Unknown
    Writer:Unknown

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  10. NASA's Unexplained Files Season 4 Episode 8 - Mars's Deepest Secret
    7.3/10(27 votes)

    S4:E8

    British astronomers working for the CIA intercept Soviet photos of the moon. A malfunction on the ISS could poison its crew with ammonia gas. A startling image taken by a NASA probe points to evidence that life could exist on Mars.

    Director:Unknown
    Writer:Unknown

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  11. NASA's Unexplained Files Season 5 Episode 2 - Curse of the Gas Giant
    7.3/10(24 votes)

    S5:E2

    Jupiter is far hotter than it should be, and scientists don't understand why. The Curiosity Rover finds something strange on Mars. Could it be a lost spacecraft or something far more sinister? Detectives turn to NASA for help with a murder cold case.

    Director:Unknown
    Writer:Unknown

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  12. NASA's Unexplained Files Season 5 Episode 8 - Saturn's Death Star
    7.3/10(19 votes)

    S5:E8

    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.

    Director:Unknown
    Writer:Unknown

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  13. NASA's Unexplained Files Season 4 Episode 3 - A President's Close Encounter
    7.2/10(28 votes)

    S4:E3

    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 president is an eyewitness to a UFO.

    Director:Unknown
    Writer:Unknown

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  14. NASA's Unexplained Files Season 4 Episode 6 - Did Earth Have Two Moons?
    7.2/10(31 votes)

    S4:E6

    A discovery suggests 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.

    Director:Unknown
    Writer:Unknown

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  15. NASA's Unexplained Files Season 5 Episode 5 - Stonehenge on Mars
    7.2/10(23 votes)

    S5:E5

    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.

    Director:Unknown
    Writer:Unknown

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  16. NASA's Unexplained Files Season 6 Episode 3 - The Black Hole Next Door
    7.2/10(27 votes)

    S6:E3

    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.

    Director:Unknown
    Writer:Unknown

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  17. NASA's Unexplained Files Season 2 Episode 6 - Nazis on the Moon
    7.1/10(26 votes)

    S2:E6

    A Russian probe discovers the lunar soil was disturbed 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 a Bermuda Triangle of Space?

    Director:Unknown
    Writer:Unknown

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  18. NASA's Unexplained Files Season 3 Episode 1 - Pluto Under Pressure
    7.1/10(32 votes)

    S3:E1

    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.

    Director:Unknown
    Writer:Unknown

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  19. NASA's Unexplained Files Season 3 Episode 8 - Attack of the Thunderballs
    7.1/10(26 votes)

    S3:E8

    Astronauts are evacuated when a mystery object is discovered hurtling towards the ISS, a NASA secret agent goes undercover to recover missing moon rocks & scientists struggle to find answers when they find a huge void at the edge of the solar system.

    Director:Unknown
    Writer:Unknown

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  20. NASA's Unexplained Files Season 4 Episode 7 - Mystery of the Invisible Planet
    7.1/10(27 votes)

    S4:E7

    A probe carrying a message to aliens malfunctions as it enters deep space. A NASA mission goes disastrously wrong when an imposter breaches Mission Control. Astronomers may have found an invisible planet around a distant star.

    Director:Unknown
    Writer:Unknown

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  21. NASA's Unexplained Files Season 2 Episode 7 - Lethal Weapons
    7.0/10(22 votes)

    S2:E7

    How did pictures from the Hubble telescope make the comet of the century look like an alien spacecraft? Has earth already been invaded by alien organisms? What mysterious force is smashing a near-earth asteroid to pieces?

    Director:Unknown
    Writer:Unknown

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  22. NASA's Unexplained Files Season 2 Episode 8 - Revenge of the Fireflies
    7.0/10(28 votes)

    S2:E8

    Something in space is attacking the brains of astronauts. What is it? Should NASA be worried about the sudden appearance of so-called space fireflies? Who is responsible for the bizarre glowing spiral in the skies over Norway?

    Director:Unknown
    Writer:Unknown

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  23. NASA's Unexplained Files Season 3 Episode 4 - Ghosts on a Comet
    7.0/10(27 votes)

    S3:E4

    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.

    Director:Unknown
    Writer:Unknown

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  24. NASA's Unexplained Files Season 3 Episode 5 - The Moon that Disappeared
    7.0/10(28 votes)

    S3:E5

    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.

    Director:Unknown
    Writer:Unknown

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  25. NASA's Unexplained Files Season 4 Episode 4 - The Earth Next Door
    7.0/10(28 votes)

    S4:E4

    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.

    Director:Unknown
    Writer:Unknown

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Best Episodes Summary

"The Sun's Evil Twin" is the best rated episode of "NASA's Unexplained Files". It scored 7.8/10 based on 17 votes. Directed by Unknown and written by Unknown, it aired on 1/6/2018. This episode scored 0.1 points higher than the second highest rated, "CIA's Secret Revenge".