Reviewed in this essay: Zero Dark Thirty, written by Mark Boal. Directed by Kathryn Bigelow. Starring Jessica Chastain, Jason Clarke, and Kyle Chandler. Running Time: 157 minutes. Opening in Toronto Jan. 11. Kathryn Bigelow’s Academy Award-winning The Hurt Locker (2009) succeeded as a straightforward study of military bomb disarmers. Although the film was set during the…