Season 4
(2016)
Cast
Episodes
Pluto's Stranger Things 0.0
August 30, 2016
Astronomers find evidence for incredible alien technology around a distant star. The first pictures of Pluto may show s…
Rise of the Planet Killer 0.0
September 6, 2016
A probe captures an image of a strange structure on Mars. Files from the first Apollo mission record an eerie sighting …
A President's Close Encounter 0.0
September 13, 2016
Geysers are discovered on a frozen moon, and NASA redirects a probe on a daring mission to detect evidence of life. An …
The Earth Next Door 0.0
September 20, 2016
Astronomers detect a potentially habitable planet tantalizingly close to Earth. A chance discovery at NASA reveals a to…
Curse of the Full Moon 0.0
September 27, 2016
Two cosmonauts fight for their lives while trapped inside a capsule in a frozen lake. A NASA scientist investigates the…
Did Earth Have Two Moons? 0.0
October 4, 2016
A discovery suggests the hellish clouds of Venus may be the origin of life on Earth. A bizarre sighting 2,000 years ago…
Mystery of the Invisible Planet 0.0
October 11, 2016
A probe carrying a message to aliens malfunctions as it enters deep space. A NASA mission goes disastrously wrong when …
Mars's Deepest Secret 0.0
October 18, 2016
British astronomers working for the CIA intercept Soviet photos of the moon. A malfunction on the ISS could poison its …