IAN: I have a feeling we're being watched. Haven't you?

DOCTOR: No. No, no, no, no, I can't see any spooks or anything. I don't think so, no. Not particularly, no. I must say that if I lived here and I heard you roaring your head off, I'd probably come down and take a look at you.

IAN: Then take my pen?

DOCTOR: Yes, what if the power's that's got hold of the TARDIS has taken your pen? Of course! Ha ha! Now then, there's something for us to solve. Come along, come along, come along.