Episode guide
NASA's Unexplained Files: Season 4
8 episodes · first aired Aug 30, 2016
TMDB has no overview for this season.
- 1 Pluto's Stranger Things Aug 30, 2016 · 1h Astronomers find evidence for incredible alien technology around a distant star. The first pictures of Pluto may show something moving across its surface. Apollo astronauts see something…
- 2 Rise of the Planet Killer Sep 6, 2016 · 1h A probe captures an image of a strange structure on Mars. Files from the first Apollo mission record an eerie sighting on the dark side of the Moon. A planet-eating star gives scientists a…
- 3 A President's Close Encounter Sep 13, 2016 · 1h 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…
- 4 The Earth Next Door Sep 20, 2016 · 1h 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…
- 5 Curse of the Full Moon Sep 27, 2016 · 1h 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…
- 6 Did Earth Have Two Moons? Oct 4, 2016 · 1h 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…
- 7 Mystery of the Invisible Planet Oct 11, 2016 · 1h 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…
- 8 Mars's Deepest Secret Oct 18, 2016 · 1h 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…