The Doctor and Idris Hopper in “Boom Town”

Hello, I've come to see the Lord Mayor.

Have you got an appointment?

No, just an old friend passing by, bit of a surprise. Can't wait to see her face!

Well, she's just having a cup of tea.

Just go in there and tell her "the Doctor" would like to see her.

Doctor who?

Just the Doctor. Tell her exactly that, "The Doctor".

Hang on a tic. [goes inside. There is the sound of a teacup smashing, and Idris returns.] The Lord Mayor says thank you f-for popping by. She'd love to have a chat, but, um, she's up to her eyes in paperwork. Perhaps you would like to make an appointment for next week...

[happily] She's climbing out the window, isn't she?

Yes, she is.