Come on, Rory! It isn't rocket science, it's just quantum physics! -The Doctor (Matt Smith)

You should always waste time when you don't have any. Time is not the boss of you. Rule 408.

I don't know. I can't tell the future I just work there.

Peter Capaldi, will always be Doctor Who. You retain the title forever. Ask your predecessors, they all think they're the real one. I've had Sunday lunch with Peter Davidson and David Tennant and they're eyeing each other like, 'It's me!

Witty and mean is easy - but fond and funny is hard.

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.

Every episode [in a TV series] is a challenge, and what's challenging in most episodes is the monster. You're always a heartbeat from the monster looking ridiculous. You really have to work so hard to make them not look like ridiculous when they turn up on the set.