The Dark Knight is a 2008 American superhero film co-written and directed by Christopher Nolan. Based on the DC Comics character Batman, the film is a sequel to 2005's Batman Begins, which rebooted the Batman film series after an eight-year hiatus. Christian Bale reprises the lead role. Batman's primary conflicts in the film include his fight against the Joker (Heath Ledger) and his strained friendship with district attorney Harvey Dent (Aaron Eckhart).
For his conception of the film, Nolan was inspired by the Joker's first two appearances in the comics and Batman: The Long Halloween. The Dark Knight was filmed primarily in Chicago (as was Batman Begins), as well as in several other locations in the United States, the United Kingdom, and Hong Kong. The director used an IMAX camera to film six major action sequences, including the Joker's first appearance in the film. The Batsuit was redesigned, with a cowl allowing Bale to move his head. The film also introduces a recreation of the Batcycle, known as the Batpod