Katara: I'm sorry I yelled at you before.
Zuko: It doesn't matter.
Katara: It's just that, for so long now, whenever I would imagine the face of the enemy, it was your face.
Zuko: My face (touches his scar) I see.
Katara: No, no, that's... that's not what I meant.
Zuko: It's okay. I used to think this scar marked me. The mark of the banished prince cursed to chase the Avatar forever. But lately, I've realized I'm free to determine my own destiny. Even if I'll never be free of my mark.
Katara: Maybe you could be free of it.
Katara: I have healing abilities.
Zuko: It's a scar. It can't be healed.
Katara (reaches around her neck and holds out a vial): This is water from the spirit oasis at the North Pole. It has special properties so I've been saving it for something important. (walks to Zuko) I don't know if it would work but... (Zuko closes his eyes and Katara touches his scar but they are interrupted by a blast)