In a recent interview, Executive Producer and Head Writer Steven Moffat teased on some important issues including Series 8 and the 12th Doctor.
Talking the 12th Doctor he told Entertainment Weekly:
“Well, it’s always just terrifying… When you’re suddenly faced with the reality that you are going to sit there and you are going to make that decision it does feel absolutely chilling. There’s a very big range of people who could play it and different ways you could go with it. We must get this right. One false move and the show’s over.”
“Unless we have an insane plan, we’ll announce a new Doctor within days of finalizing the new Doctor. I think we’ll go public pretty fast.”
“Well, I’ve known broadly speaking for a very long while because I knew how long, when he first came in, he was broadly speaking intending to do. And obviously, being the man I am, I always tried to persuade him to do longer and to do more and he [stayed] a little bit longer than he intended to. I knew that he would do what most of them do and do his three years.”
“We discussed ages ago that we would do three series and then he would do the 50th and then he’d do Christmas. That was Plan A for a very, very long while. That may sound cold that it was so far in advance but you’ve got to plan a career. [Laughs] The question was, “Will I be able to talk him out of it?” We went out for lunch and he said that he’d come very close to doing another series but it was the same argument: “If I do another series, I think I might do two more series, or three more series. I think I might never leave.” It’s that thing of wanting to leave while you’re a huge hit and not let it tail off.”
“I’ve signed up for this next year, with the new Doctor. It’s one of those jobs when you know when you’ve had enough. At the moment I haven’t had enough and I’m thoroughly enjoying it. I’m very excited for the challenge of the new Doctor and establishing that new Doctor. So, no plans to leave as yet. “