The Dark Knight

In Sir Michael Caine's opinion, Heath Ledger beat the odds and topped Jack Nicholson's Joker from Batman (1989): "Jack was like a clown figure, benign but wicked, maybe a killer old uncle. He could be funny and make you laugh. Heath's gone in a completely different direction to Jack, he's like a really scary psychopath. He's a lovely guy and his Joker is going to be a hell of a revelation in this picture." Caine bases this belief on a scene where The Joker pays a visit to Bruce Wayne's penthouse. He'd never met Ledger before, so when Ledger arrived and performed, he gave Caine such a fright, he forgot his lines.

It is said that all of the license plates seen on cars in the film are Illinois plates. In fact, they're not. They are actually plates for the fictional Gotham, although they resemble Illinois plates. The "Gotham" plates that were created by filmmakers were made to look like Illinois plates just in case some slipped through in background shots during filming in Chicago.

The DC logo contains two comic-book images: a shot of the Riddler, and picture of Batman punching him out.

The Blu-ray version of the movie has several of the big action scenes and high altitude photography scenes in ordinary 16:9 (1.78:1) widescreen ratio while the rest of the movie preserves the "scope" format (2.39:1). This is because these scenes were filmed in IMAX, whose format is 1.43:1, thus attempting to recreate the effect witnessed in IMAX theaters, as well as preserving as much of these shots as possible.