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Warner Bros. Pictures prioritized a sequel following the successful reinvention of the Batman film series with Batman Begins. Christopher and Batman Begins co-writer David S. Goyer developed the story elements, making Dent the central protagonist caught up in the battle between Batman and the Joker.
In writing the screenplay, the Nolans were influenced by 1980s Batman comics and crime drama films, and sought to continue Batman Begins’ heightened sense of realism. From April to November 2007, filming took place with a $185 million budget in Chicago and Hong Kong, and on sets in England.
The Dark Knight was the first major motion picture to be filmed with high-resolution IMAX cameras. Christopher avoided using computer-generated imagery unless necessary, insisting on practical stunts such as flipping an 18-wheel truck and blowing up a factory.