The Gotham City Police Department was such a unique element of the Batman mythos that Ed Brubaker and Greg Rucka managed a 40-issue comic series ("Gotham Central") centered on the force that was every bit as enthralling as the Dark Knight narratives happening on the periphery. From the word "go," Nolan has made sure the GCPD wasn't just some plot device but part of the fabric of the story. Drawing in Flass from the "Year One" arc in "Batman Begins" to add to the notion of a corrupt Gotham, putting Batman on the run from the force at the end of "The Dark Knight" and bringing the boys in blue face-to-face with Bane's army in "The Dark Knight Rises," Nolan got it.