Demons run when a good man goes to war. Night will fall and drown the sun when a good man goes to war. Friendship dies and true love lies. Night will fall and the dark will rise when a good man goes to war. Demons run but count the cost; the battle's won but the child is lost.

Always take a banana to a party.

The trouble with a series as it gets older is it can feel like a tradition, and tradition is the enemy of suspense, and it's the enemy of comedy. It's the enemy of everything, really. So you have to shake it up.

As we all know, it is the proper duty of every British subject to come to the aid of the TARDIS.

The Doctor: I've seen bigger. Clara: Really? The Doctor: Are you joking? It's massive!

The Doctor: Just had a fall. All the way down there, right to the library. Heck of a climb back up. Amelia: You're soaking wet. The Doctor: I was in the swimming pool. Amelia: You said you were in the library. The Doctor: So was the swimming pool.

My priorities are where they should be, which is making really great, really exciting television.