Director: Ian Levison
A look is taken at exclusive NASA footage and firsthand accounts of mysterious fly objects from astronauts and scientists are presented.
S1 E1: Episode 1
In 2005, NASA astronaut Leroy Chiao's spacewalk was interrupted by bright lights flying past. Is there a logical explanation or was there really something strange out there?
S1 E2: Alien Death Ray
The Viking Lander may have found life on Mars, but why don't we know about it? Plus, how could a starship be spotted in the Aurora Borealis?
S1 E3: Black Knight Rises
A chunk of the sun appears to have vanished. Plus, the Hubble Space Telescope spots thousands of unidentified objects travelling faster than light. Are we being watched?
S1 E4: Interstellar Gold Rush
A distant planet shows evidence of an Earth-like atmosphere, while a mysterious glowing light on the Moon mystifies astronauts. Have they found evidence of a crashed alien ship?
S1 E5: Episode 5
Countless mysterious objects have been caught by NASA's cameras. We'll reveal NASA's top ten unexplained encounters using groundbreaking interviews with astronauts and scientists.
S1 E6: Episode 6
When astronaut Leroy Chao's high-risk spacewalk is interrupted by bright lights flying past, it sparks a major investigation. Could alien life forms be to blame?
S2 E1: Life In Hell
A UFO crashes in Pennsylvania. Was it a secret Soviet satellite, or something far more dangerous? On Mercury, NASA finds the impossible: frozen water.
S2 E2: Top Secret Terror
Images of Mercury reveal massive spider-like formations on its surface. Is it an odd geological formation - or something much more ominous?
S2 E3: Lethal Weapons
The show returns with more mysterious encounters, unusual discoveries and strange sightings, straight from NASA's best and brightest.
S2 E4: Hammer Of Thor
What are the mysterious trails on the lunar surface near the Apollo landing sites? Does a strange space object spell disaster for the crew of the space shuttle?
S2 E5: Revenge Of The Fireflies
Something in space is attacking the brains of our astronauts. What is it? Should NASA be worried about the sudden appearance of so-called space fireflies?
S2 E6: Spacewalk Of Doom
An astronaut on a spacewalk begins to drown. How could this alarming event happen? Plus, have NASA discovered an asteroid that's been converted into a spacecraft?
S2 E7: Did We Nuke Jupiter?
Could NASA really be responsible for a nuclear explosion on Jupiter? Could new evidence finally reveal the truth behind the mystery of the iconic face on Mars?
S2 E8: Nazis On The Moon
A Russian probe discovers something has disturbed the lunar soil before the US or the USSR got there. But did the Nazis get there first?
S3 E1: Pluto's Stranger Things
S3 E2: Rise Of The Planet Killer
S3 E3: A President's Close Encounter
S3 E4: The Earth Next Door
S3 E5: Curse Of The Full Moon
Two cosmonauts fight for their lives, trapped inside a capsule in a frozen lake. NASA astronomers are spooked when the full moon affects their experiments.
S3 E6: Did Earth Have Two Moons?
A starling discovery suggests the hellish clouds of Venus may be the origin of life on Earth. Plus, did the earth once have two moons?
S3 E7: Mystery Of The Invisible Planet
S3 E8: Attack Of The Thunderballs
S3 E10: Curse Of The Gas Giant
S3 E11: The Sun's Evil Twin
S3 E12: Secret Aliens
S3 E13: Stonehenge On Mars
S3 E14: Cia's Secret Revenge
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