A Doctor a day/Matt Smith with Colin Baker, Sylvester McCoy, David Tennant, and Peter Davison at Red Nose Day’s Breakfast with The Doctors for the Comic Relief Auction winners, December 14, 2017, London.

Five new and exclusive photos of the sci-fi icon as he celebrates a big milestone.

Welcome to the weird and wonderful world of the Doctor. If you're new to Doctor Who and are about to tune into the latest specials, here's everything you need to know.

The 12th doctor, Peter Capaldi, dressed in drag. @Sara

Hugh Laurie shattered the mould with his spine-tingling menace as the billionaire arms dealer Richard Roper in BBC’s The Night Manager (pictured). But could he have played the hero?