Tyrion: Father, I wish to confess. I wish... to confess.
Tywin: You wish to confess?
Tyrion: I saved you. I saved this city and all your worthless lives. I should have let Stannis kill you all.
Tywin: Tyrion. Do you wish to confess?
Tyrion: Yes, Father. I'm guilty. Guilty. Is that what you want to hear?
Tywin: You admit you poisoned the king?
Tyrion: No, of that I'm innocent. I'm guilty of a far more monstrous crime. I am guilty of being a dwarf.
Tywin: You are not on trial for being a dwarf.
Tyrion: Oh, yes, I am. I've been on trial for that my entire life.
Tywin: Have you nothing to say in your defense?
Tyrion: Nothing but this I did not do it. I did not kill Joffrey, but I wish that I had. Watching your vicious bastard die gave me more relief than 1,000 lying whores.
Tyrion: I wish I was the monster you think I am. I wish I had enough poison for the whole pack of you. I would gladly give my life to watch you all swallow it.
Tywin: Ser Meryn. Ser Meryn. Escort the prisoner back to his cell.
Tyrion: I will not give my life for Joffrey's murder. And I know I'll get no justice here. So I will let the gods decide my fate. I demand a trial by combat.