Find out how writers Steven Moffat and Mark Gatiss created the television hit Sherlock, taking Sir Arthur Conan Doyle's original adventures of the Victorian super sleuth and transforming them into a worldwide sensation. Steven and Mark take us through the versions of Holmes that have inspired them - the original stories, the factual inspirations, the thousands of film versions - to arrive at the thoroughly modern Sherlock. And we go behind the scenes on set with the stars of Sherlock. Featuring interviews with lead actors Benedict Cumberbatch and Martin Freeman.