DOCTOR: Do you know Puff the Magic Dragon?

BERNICE: We went out a few times. He was very immature.

DOCTOR: Do you know the bit where Jackie Paper leaves him? Leaves him all alone?

BERNICE: I really don’t want to hear this.

DOCTOR: The dragon can’t be brave without the little boy. He doesn’t have anything to be brave for. He might as well go, might as well drift off into myth, and just be something in old stories.

BERNICE: But what would happen then? There are other monsters, other terrible things out there beside the Hoothi.

DOCTOR: Many of them. Yes.

BERNICE: Well, they must be fought. Because—and this is important. You can’t just be alone. That’s a childish thing to be. You can’t just isolate yourself from everything, no matter what terrible things have happened. You have to help other people.

DOCTOR: That’s what Jackie Paper would have said.

BERNICE: Oh. Oh, I see.

DOCTOR: What do you think?