ALICE: Honestly, has anyone ever tried to throttle you with that bowtie?

DOCTOR: Well, this one happens to be a clip-on. And also... yes. Hence the clip-on.

ALICE: But… If you're trying to tell me all this shouldn't be here… Like it's some kind of, I don't know, temporal anomaly —

DOCTOR: Oh, no. If it was that, we could run about and try to fix it. There'd be monsters and baddies and happy endings. Probably a moral. It'd be fun. But this… This is just history. That's what's so sad.