Curse Of The Gas Giant. Jupiter is hotter than it should be, and scientists are baffled. There's a strange discovery on Mars and detectives ask for NASA's help on a murder cold case. S3, Ep10
Mystery Of The Invisible Planet. A probe mysteriously malfunctions as it enters deep space. Astronomers find evidence of an invisible planet in a distant solar system. S3, Ep7
Mars' Deepest Secret. 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
Curse Of The Gas Giant. Jupiter is hotter than it should be, and scientists are baffled. There's a strange discovery on Mars and detectives ask for NASA's help on a murder cold case. S3, Ep10
Curse Of The Gas Giant. Jupiter is hotter than it should be, and scientists are baffled. There's a strange discovery on Mars and detectives ask for NASA's help on a murder cold case. S3, Ep10
The Sun's Evil Twin. Witnesses photograph two suns in the sky over Indonesia - is this the first sighting of the Sun's dark twin that could spell imminent danger to Earth? S3, Ep11
Secret Aliens. 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
Stonehenge On Mars. 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
Stonehenge On Mars. 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
CIA's Secret Revenge. When the Soviet Union unveils its own space shuttle, the CIA hatches a revenge plot. Plus, a missing nuclear weapon could threaten a NASA base in the Arctic. S3, Ep14
Saturn's Death Star. A NASA spacecraft suffers a malfunction in orbit - can its lone astronaut make it back to Earth? Plus, new evidence emerges over Yuri Gagarin's mysterious death. S3, Ep16
Planet Of The Metal Aliens. Experts investigate if a nearby exoplanet could be the home to an alien civilization after a new discovery confirms that life can thrive on such a world. S4, Ep5
Planet Of The Metal Aliens. Experts investigate if a nearby exoplanet could be the home to an alien civilization after a new discovery confirms that life can thrive on such a world. S4, Ep5
Did Aliens Nuke Mars? A strange discovery by NASA's Mars Curiosity rover suggests the Red Planet was home to an alien nuclear war 300 million years ago - could this be true? S4, Ep6
Did Aliens Nuke Mars? A strange discovery by NASA's Mars Curiosity rover suggests the Red Planet was home to an alien nuclear war 300 million years ago - could this be true? S4, Ep6