DOCTOR: Hello.

DAVID: Get back or I'll use the gun.

DOCTOR: Yes, I imagine you will. You like guns, don't you.

DAVID: This is a specialised weapon. It's designed for roof duty, designed for long range. I've never used one up close before.

ALEX: Let him go.

DAVID: No.

DOCTOR: No. In fact, let him come a little closer.

DAVID: Stay where you are.

DOCTOR: Why? Scared? Why should you be scared? You're the one with the gun.

DAVID: That's right.

DOCTOR: You like guns, don't you.

ALEX: He'll kill you.

DOCTOR: Of course he will. That's what guns are for. Pull the trigger, end a life. Simple, isn't it.

DAVID: Yes.

DOCTOR: Makes sense, doesn't it.

DAVID: Yes.

DOCTOR: A life killing life.

ALEX: Who are you?

DOCTOR: Shut up. Why don't you do it then? Look me in the eye, pull the trigger, end my life. Why not?

DAVID: I can't.

DOCTOR: Why not?

DAVID: I don't know.

DOCTOR: No, you don't, do you.

(The Doctor takes the gun from David.)

DOCTOR: Throw away your gun.

(Alex drops his gun.)