Nasa's Unexplained Files
Catching up on Nasa's Unexplained Files?
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A strange discovery by NASA's Mars Curiosity rover suggests the Red Planet was home to an alien nuclear war 300 million years ago - could this be true?
Experts investigate if a nearby exoplanet could be the home to an alien civilization after a new discovery confirms that life can thrive on such a world.
When NASA discovers something strange on Saturn's biggest moon, experts investigate if aliens feeding on the electric atmosphere could be the culprit.
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 a plot against America.
When astronomers discover a rogue black hole in the Milky Way, they investigate how much danger it poses to Earth, and what would happen if it ever entered our solar system.
After NASA's New Horizons spacecraft flies by Pluto, it encounters a strange alien world that shuts down the probe's computers, and experts investigate this mysterious object.
Season 2
43:00
43:00Looking at how pictures from the Hubble telescope make the comet of the century look like an alien spacecraft. Examine how earth may have already been invaded by alien organisms.
43:00Images of Mercury show large spider-like formations on its surface; A classified space shuttle mission almost ends in disaster.
Season 3 42:00
42:00Explores exclusive NASA footage and firsthand accounts of mysterious flying objects from astronauts and scientists.
42:00A look is taken at exclusive NASA footage and firsthand accounts of mysterious flying objects from astronauts and scientists.
43:00Lost tapes reveal that Apollo astronauts heard unexplained transmissions on the far side of the moon and an unidentified object in Earth orbit starts stalking Russian spacecraft.