HERBERT: It's a blue monolith!

DOCTOR: Hello! Have you seen a rather surprised young lady?

(Herbert holds up the crucifix and backs into the cottage.)

HERBERT: Avaunt thee, foul fanged fiend.

DOCTOR: I can assure you I'm not that long in the tooth, and neat blood brings me out in a rash.

HERBERT: Back from where you came, spirit of the glass.

DOCTOR: Not just yet, if you don't mind.