The Dark Knight

Why's he running, Dad?

Because we have to chase him.

He didn't do anything wrong.

Because he's the hero Gotham deserves, but not the one it needs right now. So we'll hunt him... ... because he can take it. Because he's not our hero. He's a Silent Guardian... ...a Watchful Protector.  The Dark Knight... " 

The Dark Knight, Christopher Nolan's brooding 2008 take on the War on Terror is one of the finest movies of the 21st century and probably its best big budget film.  Thought provoking but never steers you to a clear conclusion - it makes the viewer do the work.  What is the proper balance in  protecting society? How far would you go in breaking the norms in order to protect? When faced with horrible choices how would you decide?