- Dr. Who: [Barbara begins to laugh] What is it? What do you find so amusing, hmm?
- Barbara Wright: Oh, I don't know. Yes, I do. It's this feverish activity to try and stop something that we know is going to happen. Robespierre will be guillotined whatever we do!
- Dr. Who: [gravely] I've told you of our position so often.
- Barbara Wright: Yes, I know. You can't influence or change history. I learnt that lesson with the Aztecs.
- Dr. Who: The events will happen, just as they are written... I'm afraid so and we can't stem the tide. But at least we can stop being carried away with the flood! Now, Susan and the prison.
- Dr. Who: Well, I can assure you, my dear Barbara, Napoleon would never have believed you.
- Ian Chesterton: Yes, Doctor, but ah, supposing we had written Napoleon a letter, telling him, you know, some of the things that were going to happen to him.
- Susan Foreman: It wouldn't have made any difference, Ian. He would have forgotten it, or lost it, or thought it was written by a maniac.
- Barbara Wright: [wryly] I suppose if we'd tried to kill him with a gun, the bullet would have missed him.
- Dr. Who: Well, it's hardly fair to speculate, is it? No, I'm afraid you belittle things.
- [over a starscape, their voices can still be heard]
- Dr. Who: Our lives are important, at least to us. But as we see, so we learn.
- Ian Chesterton: And what are we going to see and learn next, Doctor?
- Dr. Who: Well, unlike the old adage, my boy, our destiny is in the stars, so let's go and search for it.
- Ian Chesterton: Here they are.
- [The Doctor enters, still in his official uniform. Behind him is the tall figure of Lemaitre.]
- Barbara Wright: [surprised by Lemaitre's entrance] Lemaitre!
- Jules Renan: Your friend has betrayed us!