Do you know how you make someone into a Dalek? Subtract Love, add Anger.

I'd forgotten not all victories are about saving the universe.

We're thrilled to have Maisie Williams joining us on Doctor Who. It's not possible to say too much about who or what she's playing, but she is going to challenge the Doctor in very unexpected ways. This time he might just be out of his depth, and we know Maisie is going to give him exactly the right sort of hell.

Kathy Nightingale: What's good about sad? Sally Sparrow: It's happy for deep people.

Hitler: Thank you, whoever you are. I think you just saved my life. The Doctor: Believe me... It was an accident.

Being the only writer on a successful show is very rewarding.

If it’s time to go, remember what you’re leaving. Remember the best.