`I'm the Doctor. I'm a Time Lord. I'm from the planet Gallifrey in the constellation of Kasterborous. And I'm the man who's going to save your life.'

He's made a mark on almost every era of history, and he's touched millions of lives across space and time. In these pages you'll find just some of the stories behind those brief encounters, each of them addressing the question that must never, ever be answered: 'Doctor Who?'

This is the story of an impossible life - of a man who borrowed a spaceship, travelled through time and continually saved the universe - as told by the Doctor's friends, by his enemies, and by the man himself. Letters, journals, trial records, secret government files and the occasional bit of tabloid journalism reveal the never-before-told story of Gallifrey's last Time Lord.