JULES: He betrayed us, Barbara.

BARBARA: He was a traitor to you. To his side he was a patriot.

IAN: Barbara, we've taken sides just by being here. Jules actually shot him. It could just as easily have been me.

JULES: And what about Robespierre? I suppose you think-

BARBARA: Well just because an extremist like Robespierre-

IAN: Oh, Barbara, Jules is our friend. He saved our lives!

BARBARA: I know all that! The revolution isn’t all bad, and neither are the people who support it. It changed things for the whole world, and good, honest people gave their lives for that change.

IAN: Well, he got what he deserved.

BARBARA: You check your history books, Ian, before you decide what people deserve.

ROMANA: Right, let’s see where we are.

(They turn on the scanner.)

DOCTOR: Oh look, rocks.

(And turn it off again.)

SKALDAK: I am Skaldak! This planet is forfeit under Martian law.

DOCTOR: Then teach them. Teach them, Grand Marshal. Show them another way. Show them there is honour in mercy. Is this how you want history to remember you? Grand Marshal Skaldak, Destroyer of Earth. Because that’s what you’ll be if you send those missiles. Not a soldier, a murderer. Five billion lives extinguished. No chance for goodbyes. A world snuffed out like a candle flame! All right. All right, Skaldak, you leave me no choice. I’m a Time Lord, Skaldak. I know a thing or two about sonic technology myself.

SKALDAK: A threat? You threaten me, Doctor?

DOCTOR: No. No, not you, all of us. I will blow this sub up before you can even reach that button, Grand Marshal. Blow us all to oblivion.

SKALDAK: You would sacrifice yourself?

DOCTOR: In a heartbeat.

SKALDAK: Mutually assured destruction.

DOCTOR: Look into my eyes, Skaldak. Look into my eyes and tell me you’re capable of doing this. Huh? Can you do that? Dare you do that? Look into my eyes, Skaldak. Come on. Face to face.

SKALDAK: Well, Doctor.