A potentially disastrous fuel leak forces three astronauts to make a risky return to earth. And a NASA lunar probe reveals a mysterious crashed craft on the moon. S3/Ep9
A potentially disastrous fuel leak forces three astronauts to make a risky return to earth. And a NASA lunar probe reveals a mysterious crashed craft on the moon. S3/Ep9
A NASA probe captures an image of a familiar structure on the surface of Mars. What made 'Mars Henge'? Plus, how did an Apollo astronaut get sick on the Moon? S3/Ep13
Geologists discover alien deposits on the Earth's surface - and the answer could shed light on the cause of the greatest extinction in its history. S3/Ep12
A malfunction on the ISS could poison its crew with a deadly gas. A startling image taken by a NASA probe points to evidence that life could exist on Mars. S3/Ep8
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/Ep5
Astronomers detect a potentially habitable planet tantalizingly close to Earth. A chance discovery at NASA reveals a top secret military space program. S3/Ep4
Geysers are discovered on a frozen moon, NASA redirects a probe on a mission to find proof of life, and a future US President is eyewitness to a UFO. S3/Ep3
Apollo 12 astronauts bring back something alive from the moon. Plus, NASA track an asteroid heading towards Earth and make a shocking discovery. S3/Ep2
Did Apollo astronauts hear unexplained transmissions on the far side of the moon? Plus, an astronomer spots a strange disturbance in Martian atmosphere. S3/Ep1
Newly discovered documents reveal NASA's secret plan B for failure of the first moon landing. And NASA's Cassini mission unravels a 300-year-old mystery. S3/Ep5
When a Chinese moon rover breaks down, a NASA scientist points to a mysterious material that seemed to sabotage the Apollo missions, decades earlier. S3/Ep4
An Apollo 17 photo seems to show a US military outpost on the Moon and is life in the oceans of Jupiter's moons? Plus Neil Armstrong faces real danger. S3/Ep3
Apollo 12 astronauts bring back something alive from the moon and NASA track an asteroid heading towards Earth only to make a shocking discovery. S3/Ep2
Lost tapes reveal Apollo astronauts hear unexplained transmissions on the moon, and a strange object in Earth's orbit starts stalking Russian spacecraft. S3/Ep1
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/Ep6
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/Ep5
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/Ep5
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/Ep4
How did pictures from the Hubble telescope make the comet of the century look like an alien spacecraft? Has earth already been invaded by alien organisms? S2/Ep3
How did pictures from the Hubble telescope make the comet of the century look like an alien spacecraft? Has earth already been invaded by alien organisms? S2/Ep3
Test pilot Gordon Cooper is preparing to test a radical new landing system in a lakebed when two UFO's appear. Also, the mystery of Saturn's mega-hex. S1/Ep6
Could spaceships really be powered by atomic bombs? Plus, why was Neil Armstrong's transmission feed cut off when he spotted strange lights on the Moon? S1/Ep5
The Hubble Telescope spots thousands of unknown objects travelling faster than light. Are we being watched? Or could we ourselves be aliens from another world? S1/Ep3
The Viking Lander may have found life on Mars. Meanwhile, how can a starship be spotted in the Aurora Borealis? And what exactly are NASA's mysterious Moon Pigeons? S1/Ep2
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? S1/Ep1
Test pilot Gordon Cooper is preparing to test a radical new landing system in a lakebed when two UFO's appear. Also, the mystery of Saturn's mega-hex. S1/Ep6
Could spaceships really be powered by atomic bombs? Plus, why was Neil Armstrong's transmission feed cut off when he spotted strange lights on the Moon? S1/Ep5
The Hubble Telescope spots thousands of unknown objects travelling faster than light. Are we being watched? Or could we ourselves be aliens from another world? S1/Ep3
The Viking Lander may have found life on Mars. Meanwhile, how can a starship be spotted in the Aurora Borealis? And what exactly are NASA's mysterious Moon Pigeons? S1/Ep2
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? S1/Ep1