Because I killed. And I caused to have killed. I sent young men and women to their deaths, but here I am still alive and.. That tend to haunt you, living, after so much of.. the other thing. —Professor Alec Palmer
We all change. When you think about it, we’re all different people all through our lives. And that’s okay. That’s good. You gotta keep moving, so long as you remember all the people that you used to be.
“It felt very emotional to be doing my final episode. My mother is mortified, honestly she was at the front of campaign for me to stay and wasn’t happy when I said I was going to leave. But, when you’ve got to go, you’ve got to go. Of course, it’s very sad for me in many ways because everything is the last time. It’s the last read-through, the last time I put on the bow tie and the last scene in the TARDIS. But the show is about change and I had lunch with Peter Capaldi shortly after the announcement and I think he’s just going to be incredible. He has the most brilliant ideas. As a fan, I’m genuinely excited to see what he’s going to do because I think he’s going to do something extraordinary.”
As a character, the Doctor is excited and fascinated by the tiniest of things. By everything. By every single thing. That's what's wonderful about him as a character. It's why children like him, I think. Because he doesn't dismiss anything. He's not cynical. He's open to every single facet of the universe. - Matt Smith