Downfall, director Oliver Hirschbiegel’s exploration of Adolf Hitler’s final days, succeeded by going deep, fully acknowledging its subject’s unimaginable monstrousness while also locating an aggrieved peevishness that made him fascinatingly, horribly relatable. (Can a zillion YouTube parodies be wrong? Well, yes, but not in this case.) 13 Minutes, Hirschbiegel’s return to the time frame, unfortunately can’t quite manage the same burrowing feat. Although its depiction of courage under titanic pressure is both harrowing and heroic, it never really pinpoints the central character’s defining moment.