NASA's Unexplained Files — Season 4, episode 8 watch online
NASA's Unexplained Files, season 4 episode 8 «Mars's Deepest Secret»: air date October 18, 2016. Episode overview, season trailer and the cast of NASA's Unexplained Files.
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.
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Episodes — Season 4
- 1 Episode 1 «Pluto's Stranger Things» August 30, 2016
- 2 Episode 2 «Rise of the Planet Killer» September 6, 2016
- 3 Episode 3 «A President's Close Encounter» September 13, 2016
- 4 Episode 4 «The Earth Next Door» September 20, 2016
- 5 Episode 5 «Curse of the Full Moon» September 27, 2016
- 6 Episode 6 «Did Earth Have Two Moons?» October 4, 2016
- 7 Episode 7 «Mystery of the Invisible Planet» October 11, 2016
- 8 Episode 8 «Mars's Deepest Secret» October 18, 2016