The Time Meddler

VICKI: Doctor? He says the TARDIS isn't a time machine.

DOCTOR: Oh, does he now?

VICKI: Tell him.

DOCTOR: I don't see why I should, my child. He'll learn soon enough.

STEVEN: Look, Doctor, I've seen some spaceships in my time, admittedly nothing like this. Well, what does this do?

DOCTOR: That is the dematerialising control and that, over yonder, is the horizontal hold. Up there is the scanner, those are the doors, that is a chair with a panda on it. Sheer poetry, dear boy. Now please stop bothering me.