Season 6 of the pioneering series takes viewers further than ever, to the extreme edges of our solar system, where chaos and catastrophe bring epic drama to the planets. Features astounding NASA footage and the opinions of leading astrophysicists to probe even more deeply into the billion-year-old story of the world beyond Earth.

Disc 1 : Catastrophes that changed the planets -- Nemeiss : the Sun's evil twin -- How the solar system was made -- Crash landing on Mars -- Disc 2 : Worst days on planet Earth -- God and the Universe -- UFO, the real deal -- How big, how far, how fast -- Disc 3 : Our place in the Milky Way -- Alien sounds -- Deep freeze -- Disc 4 : Microscopic universe -- Ride the comet -- When space changed history.