The Dark Knight is dedicated to the memory of a deceased cast member.
 Dent was written as The Dark Knight's central character, serving as the center of the battle between Batman, who believes Dent is the hero the city needs, and the Joker, who wants to prove even the most righteous people can be corrupted
  According to historian Stephen Prince, The Dark Knight is about the consequences of civil and government authorities abandoning rules in the fight against terrorism

