We have been mesmerized by Venus since ancient times. Was this a paradise world teeming with life? This film tells the remarkable story of how spacecraft revealed the true nature of Earth's enigmatic twin, that it's a lifeless hell – and that the Earth could follow suit.

Jupiter is a massive and dangerous planet, surrounded by a wreath of deadly radiation. This is the story of how humans built machines that not only survived the perils of the huge gas giant but revealed its innermost secrets.