EVELYN: I never quite understand. If the scanner sets your suspicious radar off, why oh why do we always get out of the Tardis and have a look anyway?

DOCTOR: Initial fears, by their very nature, are never meant to last long. At least the darkness is satisfactorily explained. Some sort of tunnel, obviously.

EVELYN: Hello?

DOCTOR: Do you have to?

EVELYN: When in a cliff-hanging situation, always go for the cliché. That's my motto.