DOCTOR: An unintelligent enemy is far less dangerous than an intelligent one, Jamie. Just act stupid. Do you think you can manage that?

JAMIE: Well it's simple isn't it? All we've got to do is dig a tunnel through from here to the borehole and catch the seed device thing on it's way down. Well, it was just an idea.

DOCTOR: But Jamie, it's a brilliant idea! It's so simple only you could have thought of it.

JAMIE: Oh. Eh?

JAMIE: Doctor, come on, will ye? The whole place is going to blow up.

DOCTOR: Oh, it's quite all right, Jamie. The planet is quite safe. There's just going to be a localised volcanic eruption. It'll only affect the island.

JAMIE: Maybe so, but we happen to be on the island.

DOCTOR: Oh, my word!

(The Doctor holding a gun in front of him)

RAGO: What does it do?

DOCTOR: Oh, oh, I see. Well, guns kill people. Is that what you wanted to know?

RAGO: Fire it.

DOCTOR: Well, I don’t think I. You have to put something into it first, And it comes out here, as far as I remember.