Vastra: Was she nice?
The Doctor: I just spoke to her.
Vastra: And made your usual impact, no doubt.
The Doctor: No, no impact at all. Those days are over.
Vastra: You can't help yourself. It's the same story every time and it always begins with the same two words.
The Doctor: She'll never be able to find me again. She doesn't even have the name. "Doctor." What two words?
Clara: Doctor? Doctor who?