In 1990 Hubble was the first major optical telescope to be placed in space and it has been one of the most important instruments ever created in the history of science. It has changed forever our knowledge of the stars, planets and distant galaxies. Without it we wouldn't have seen qiant storms on Mars, learnt about black holes or seen Comet Shoemaker crash into Jupiter. But the time has come for its instruments to be upgraded and its life extended. We watch the crew of the Space Shuttle Atlantis on the launch pad ready for their dangerous mission to fit new batteries, a new data handling system, a new wide field camera and a new spectrograph to the Hubble. A previous mission astronaut explains how astronauts train for space walks, how they deal with using tools whilst wearing a space suit and what they do in the hours and minutes leading up to lift off. It's fascinating and thrilling and culminates in live footage of the blast off from the Kennedy Space Center in Florida.