Bill Potts (to 12th): You're an arse. Do you know that? You're a... You're a stupid bloody arse.

First Doctor: If I hear any more language like that from you, young lady, you're in for a jolly good smacked bottom.

Twelfth Doctor: Can we just pretend that that never happened?

Bill Potts: I'm a broad-minded girl - I mean, I know we have this whole professor/student thing going on...

Twelfth Doctor: Can we never, ever talk about this again?

Bill Potts: I hope we talk about it loads. I hope we spend years laughing about it.