E8 • Revenge Of The Fireflies

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.

43m • 2015

A UFO crashes in Pennsylvania. Was it a secret Soviet satellite, or something far more dangerous? On Mercury, NASA finds the impossible: frozen water.

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?

43m • 2015

Images of Mercury reveal massive spider-like formations on its surface. Is it an odd geological formation - or something much more ominous?

E3 • 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?

42m • 2015

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?

E4 • 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?

44m • 2015

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?

E5 • 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?

42m • 2015

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?

E6 • 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?

42m • 2015

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?

E7 • Lethal Weapons

The show returns with more mysterious encounters, unusual discoveries and strange sightings, straight from NASA's best and brightest.

44m • 2015

The show returns with more mysterious encounters, unusual discoveries and strange sightings, straight from NASA's best and brightest.

E8 • 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?

44m • 2015

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?