- Cyber Controller: Emotion is a weakness.
- The Doctor: I don't think so.
- Cyber Controller: It brought you back for your friend, and it will cost you your life.
- The Doctor: I thought the Cybermen had destroyed the Cryons.
- Flast: So did they. But as you see, some of us survived. Not many, but some. You're looking very blue.
- The Doctor: Do you mean depressed, or cold?
- Flast: Ah, I think I shall enjoy your company.
- The Doctor: Not for long, I hope. I won't last half an hour in here, I'm freezing.
- [last lines]
- The Doctor: It didn't go very well, did it?
- Peri: Earth's safe. So is history and the web of time.
- The Doctor: I meant on a personal level. I don't think I've ever misjudged anybody quite as badly as I did Lytton.