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.