Exterminate/regenerate

On screen, 'Doctor Who' is a story of monsters, imagination and mind-expanding adventure. But the off-screen story is equally extraordinary - a tale of failed monks, war heroes, 1960s polyamory and self-sabotaging broadcasting executives. From the politics of fandom to the inner struggles of the BBC, thousands of people have given part of themselves - and sometimes, too much of themselves - to bring this unlikeliest of folk heroes to life. This is a story of change, mystery and the importance of imaginary characters in our lives.