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NASA's Unexplained Files Season 4 Episodes
Season 4 Episode Guide
8 Episodes 2016 - 2016
Episode 1
Pluto's Stranger Things
Tue, Aug 30, 201642 mins
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.
Episode 2
Rise of the Planet Killer
Tue, Sep 6, 201642 mins
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.
Episode 3
A President's Close Encounter
Tue, Sep 13, 201642 mins
NASA Astronaut discusses the 1997 collision of the Progress into the Mir and the life and death struggle that followed. NASA OIG Senior Special Agent uncovers what the Russians are not telling NASA about the collision and the Mir.
Episode 4
The Earth Next Door
Tue, Sep 20, 201642 mins
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 could be rich in the building blocks for life.
Episode 5
Curse of the Full Moon
Tue, Sep 27, 201642 mins
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.
Episode 6
Did Earth Have Two Moons?
Tue, Oct 4, 201642 mins
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 the Earth once had two moons. A NASA scientist helps the FBI crack the 1996 Olympic bombing.
Episode 7
Mystery of the Invisible Planet
Tue, Oct 11, 201642 mins
A brilliant astronaut and CIA impersonator gains entry to NASA's Mission Control. A NASA OIG Senior Special Agent tracks the impostor down and before taking him into custody he unravels the impostor's incredible story.
Episode 8
Mar's Deepest Secret
Tue, Oct 18, 201642 mins
British astronomers working for the CIA intercept Soviet photos of the moon. A malfunction on the ISS could poison its crew with deadly ammonia gas. A startling image taken by a NASA probe points to evidence that life could exist on Mars.