NOVA Bombing Hitler’s Supergun airs on WSKG TV May 11, 2016 at 9pm. Spring 1943. World War II is slowly beginning to turn in favor of the Allied forces. But, growing desperate, Hitler hatches plans for a diabolical weapon: a bank of “superguns” housed in a massive underground complex in Nazi-occupied northern France. Together the guns would be able to pump 300 heavy high explosive shells into downtown London every hour—a target 100 miles away.