IAN: Maybe you have succeeded. Maybe we are where you say we are. But I remember an occasion when you took us home once before.

BARBARA: Yes, and we met Marco Polo.

DOCTOR: Entirely different circumstances! I’m rather tired of your insinuations that I am not master of this craft. Oh, I admit, it did develop a fault, a minor fault on one occasion, perhaps twice, but nothing I couldn’t control.

IAN: I know that. Of course you’re in control. You’re always in control. And I’m sure you could revisit us at any time.

DOCTOR: Very simple. Quite simple.

IAN: Exactly, quite simple. But you have your important researches to complete. You may not find the time. There’s a chance that we won’t meet again. Don’t you think it would be better if we parted under more friendly circumstances, say over a drink?

DOCTOR: Yes. Yes, well perhaps, since you put it that way, an hour or two won’t come amiss. Susan, bring my stick will you?

SUSAN: Yes, Grandfather?

DOCTOR: I’m going to see Ian and Barbara back home safely.