Honestly, I could talk to you for seven hours and not run out of great things to say about David Tennant.

One of your jobs as a writer is to cut out the noise. All you have is your instincts and your process.

Having made other shows, the thing with 'Doctor Who' is that you're doing everything, all at once.

Doctor Who' is such a broad show. It's got the whole universe to explore.

But I think whenever you're bringing in a new Doctor, you have to set it up in a really great way because it's an entry point for a whole audience. Because the audience of 'Doctor Who' is everyone from eight to 108, life is continually creating new viewers.

I think 'Doctor Who' is the greatest idea television has ever had, and our job is to convince the rest of the world.