With his last episode due to air at Christmas, we asked Doctor Who‘s head writer and showrunner Steven Moffat if he ever thought, back in 2004, when he wrote The Empty Child, that he’d still be writing for the series in 2017? “No, God, no!” he exclaims. “God, no! I also didn’t think I’d do the showrunning job for more than three years, and I’m here after six series. Yes, I’ve been writing Doctor Who stories since 2004. That’s a hell of a long time.