Rose: 'If you are an alien, how come you sound like you're from the north?' Doctor: 'Lots of planets have a north!

Time travel is always more magical somehow when you go into the past. Traveling into the future is something you do, every day. You're just not going to get very far. So, I rather like the past travel.

It’s been a long time since Sherlock Holmes jumped off that roof - it’s time to reveal the truth about what happened between him and the pavement.

Young Reinette: Monsieur, be careful! The Doctor: It's just a nightmare, Reinette, don't worry, everyone has nightmares. Even monsters under the bed have nightmares! Young Reinette: What do monsters have nightmares about? The Doctor: Me!

It's a fez. I wear a fez now. Fezes are cool.

Amy: I had something I wanted to tell him. Stuff always gets in the way. Canton: Stuff does that.

You can be as beautiful and charming as you'd like, but if you're not terrific at acting, it will mean nothing on the screen.