Jupiter is hotter than it should be, and scientists are baffled. There's a weird discovery on Mars and detectives ask for NASA's help on a murder cold case.

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  • {S}03.{E}19. The Sun's Evil Twin

    S03.E19. 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?
    Duration: 43 Min
  • {S}03.{E}20. Secret Aliens

    S03.E20. 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.
    Duration: 44 Min
  • {S}03.{E}21. Stonehenge On Mars

    S03.E21. 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 in on the Moon?
    Duration: 44 Min