When discussing The Dark Knight it's incredibly easy to spend copious amounts of time looking at the psychotic glory of Heath Ledger's Joker. But that can often take away from the fact that Nolan's exemplar second Batman, which still stands as the zenith of the superhero genre, isn't just the late actor's movie, boasting an incredible take on beloved Batman rogue Two-Face. Harvey Dent is the perfect anti-hero, over the course of the film going from the ideal moral standpoint to an emblem of how even the best of us can fall. Played by Aaron Eckhart, his story is the real narrative power behind The Dark Knight, with the possibility of being able to retire from the cape and cowl providing the central conflict for Bruce Wayne. Beating out the likes of Mark Ruffalo and Liev Schreiber for the part, mainly thanks to his brilliant turn in Thank You for Smoking, Eckhart completely owned the role, with talk of him potentially returning for The Dark Knight Rises (despite the unfortunate handicap of being dead) getting many Bat-fans giddy with excitement. In the latest entry in our on-going look at what actors brought to various Batman roles (we've previously looked at Christian Bale's Batman, Tom Hardy's Bane, Anne Hathaway's Catwoman and both Jack Nicholson and Heath Ledger's Joker), today we're taking a look at eight things you probably didn't know Aaron Eckhart did that made his Harvey Two-Face so awesome.