Channel 4 - Building Hitler's Supergun The Plot to Destroy London (2015)

By the spring of 1943, for the first time since the beginning of World War II, Hitler was on the back foot. As Allied bombs rained down on German cities, the Fuhrer was determined to hit back. He drew up plans for the biggest gun the world has ever seen the V-3 Supergun. From its bunker buried deep in a French hillside, this monstrous 25-barrelled cannon was designed to reduce London to rubble, and turn the course of the war back in Hitler's favour. In a race to knock out the supergun, the allies dreamt up their own miracle weapons.

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