(Dialogue from The Space Museum:)
Barbara: Have you noticed something? I mean something very peculiar.
Ian: Well, everything’s peculiar.
Doctor: My dear Barbara, if you’ve seen something or somebody, there’s no sense in talking in riddles, is there?
Barbara: No, Doctor, not seen. It’s the silence. When we stop talking there isn’t a sound. Listen. It’s the sort of silence you could almost hear.
Ian: Hmm… More and more like a graveyard.
Doctor: Oh, that’s quite enough. Stop it. You’ll have us all imagining things.