BRIGADIER: Still sceptical?

LIZ: Of course. I deal with facts, not science fiction ideas.

BRIGADIER: Miss Shaw, I'm not a fool. I don't chase shadows. What you don't understand is that there might, there is a remote possibility that outside your cosy little world other things could exist.

LIZ: No need to get tetchy.

BRIGADIER: Well, sometimes you can be very aggravating.

LIZ: Me? What about you? You really believe in a man who's helped to save the world twice? With the power to transform his physical appearance?

BRIGADIER: I'm not sure yet. It may not be the same man.

LIZ: An alien who travels through time and space in a police box?