Mayor: [regarding The Joker that's sitting a holding cell] What'd we got? Lt. James Gordon: Nothing. No matches on prints, DNA, dental. Clothing is custom, no labels. Nothing in his pockets but knives and lint. No name, no other alias.

The Dark Knight
Commissioner Gillian B. Loeb: [regarding The Joker's threat on his life] You're unlikely to discover this for yourself, so take my word, the police commissioner gets a lot of threats. I found the appropriate response to these situations a long time ago. [pulls out a bottle of whiskey and glass]

The Dark Knight
Det. Ramirez: [regarding CCTV photos of The Joker's bank heist] He can't resist showing us his face. Lt. James Gordon: What's he hiding under that make-up?