“I’ve been thinking lately. About you and me. About what’s going to happen to us, in the end. We’re going to kill each other, aren’t we?” The WP‘s Hank Steuver offers a brief history of the Joker, from Conrad Veidt in The Man Who Laughs to Heath Ledger tomorrow night. If you’re headed to TDK absolutely spoiler-free, I’d skip this one — quite a few plot details herein.