Arthas: Glad you could make it, Uther.
Uther: Watch your tone with me, boy. You may be the prince, but I'm still your superior as a paladin.
Arthas: As if I could forget. Listen, Uther, there's something about the plague you should know. Oh no. It's too late. These people have all been infected. They may look fine now, but it's a matter of time before they turn into the undead.
Uther: What?
Arthas: This entire city must be purged.
Uther: How can you even consider that? There's got to be some other way
Arthas: Damn it, Uther. As your future king, I order you to purge this city.
Uther: You are not my king yet, boy. Nor would I obey that command if you were!
Arthas: Then I must consider this an act of treason.
Uther: Treason? Have you lost your mind, Arthas?
Arthas: Have I? Lord Uther, by my right of succession and sovereignity of my crown, I hereby relieve you from your command and suspend your paladins from service.
Jaina: Arthas, you can't just...
Arthas: It's done! Those of you who have the will to save this land, follow me. The rest of you... get out of my sight.
Uther: You've just crossed a terrible threshold, Arthas.
Arthas: Jaina?
Jaina: I'm sorry, Arthas. I can't watch you do this.