The best movie I watched in 2008.

Got suprised because it's a serious tragedy, with painful thinking of human stain, far from an entertaining marvel film.

Unexpectedly shocked by the talent of the scenarist, and the passed-away actor Heath Ledger too.

Batman and Joker in the interrogation room
JOKER: To them(public) you're just a freak, like me. They need you right now. When they don't, they'll cast you out, like a leper. You see, their morals, their code, it's a bad joke, dropped at the first sign of trouble. They're only as good as the world allows them to be. I'll show you. When the chips are down, these civilized people, they'll eat each other. See, I'm not a monster. I'm just ahead of the curve.

Joker and Harvey in the hospital. The talk which evetually pushes Harvey's falling. ( Harvey's girlfriend Rachel had already been killed by Joker and one side of his face was burned horrifying. )
With enormous pain and hatred, Harvey pointed that Joker had planned to kill them.
JOKER: Do I really like a guy with a plan? ......... I just do things. The Mob has plans. The cops have plans. Gordon's got plans. You know, they're schemers. Schemers trying to control their little worlds. I'm not a schemer. I try to show the schemers how pathetic their attempts to control things really are. ......... Look what I did to this city with a few drums of gas and a couple of bullets. You know what I noticed? Nobody panics when things go "according to plan." Even if the plan is horrifying. If tomorrow I tell the press that, like, a gangbanger will get shot, or a truckload of soldiers will be blowing up, nobody panics. Because it's all part of the plan. But when I say that one little old mayor will die, well then, everyone loses their minds. Introduce a little anarchy. Upset the established order and everything becomes chaos. I'm an agent of chaos. Oh, and you know the thing about chaos? It's fair.

Batman's effort to save Harvey back from madness failed. (Harvey Dent had ever been a procurator, extremely eager for justice, and finally became the villainous two-face man, taking away people's life up to probability.)
Harvey pointed the gun at Gordon's son.
HARVEY: It's not about what I want. It's about what's fair! You thought we could be decent man in an indecent time. But you were wrong. The world is cruel. And the only morality in the cruel world is chance. Unbiased, unprejudiced, fair.
BATMAN: What happened to Rachel wasn't chance. We decided to act. We three.(himself, Harvey and Gordon)
HARVEY: Then why was it me who was the only one who lost everything?(He really loves Rachel. He wished the one that be killed were him.)
BATMAN: It wasn't.
HARVEY: The Joker chose me!
BATMAN: Because you were the best of us. He wanted to prove that even someone as good as you could fall.
HARVEY: And he was right.