The Dark Knight is a 2008 superhero film directed by Christopher Nolan. Based on DC Comics characters, it serves as the sequel to Batman Begins and the second film in The Dark Knight trilogy. The narrative centers on Batman, police lieutenant James Gordon, and district attorney Harvey Dent as they work together to dismantle organized crime in Gotham City. Their efforts are complicated by the emergence of the Joker, a chaotic criminal mastermind intent on testing Batman's moral limits. The ensemble cast features Christian Bale as Batman, Heath Ledger as the Joker, Gary Oldman as Gordon, Aaron Eckhart as Harvey Dent, and Michael Caine, Maggie Gyllenhaal, and Morgan Freeman in supporting roles. The film received widespread critical acclaim and became a major commercial success, grossing over $1 billion worldwide.