Chris Hadfield has described going into space as 'strapping yourself on top of what is essentially a large bomb'. He is one of the world's most respected astronauts, and his career has included Space Shuttle flights and helping to build the Mir Space Station, as well as serving as Director of NASA's operations in Russia and as Commander of the International Space Station during his final five-month mission. If that wasn't enough he's also a bestselling author and an accomplished musician - indeed he plays in an all-astronaut band. His cover of David Bowie's Space Oddity - which he recorded while orbiting the earth on the Space Station at over 17,000 miles an hour - has had more than 33 million Internet hits.

Chris talks to Michael Berkeley about his route to the stars, about overcoming fear and extreme danger - and the difficulties of playing a guitar in zero gravity.

Producer: Jane Greenwood