Spring 1943. A Squadron of Lancaster bombers knocked out two massive dams in the heart of industrial Germany. They used an unusual and ingenious weapon; a huge, spinning garbage can full of explosives - that bounced on water. It was the brainchild of Barnes Wallis, an engineer obsessed with the idea of shortening the war. He started off experimenting with marbles in his back garden and after a three year struggle with disapproving pen pushers finally convinced the RAF of his crazy idea. 'The Dambusters' is an epic tale of ingenuity, perseverance, skill and bravery. A Joint effort of airmen from Britain, Canada, Australia, New Zealand and America that went down in history as one of the most daring raids of the second World War.