Gregory Burke’s acclaimed 2006 play Black Watch is a ferocious, real-time docudrama about British soldiers in Iraq; this 2014 thriller, scripted by Burke and directed by Yann Demarge, is a similarly immersive account of British soldiers in early-70s Northern Ireland. An inexperienced young soldier (Jack O’Connell of Unbroken and David Mackenzie’s Starred Up) spends two days running for his life after getting separated from his unit during a skirmish. The movie sticks close to his perspective, for better and for worse; it’s a potent, visceral experience, but it doesn’t offer much historical context, and its depiction of the IRA is fairly simplistic.