Country-of-origin UK quad for this very British tale of heroism and ingenuity in the allied efforts to destroy the german dams in WW2. This is from the 1960's re-release featuring a duotone version of the original full colour artwork from the 1955 first release. After inventing the "bouncing bomb," which can skip across water until it encounters a dam to explode, Dr. Barnes Wallis (Michael Redgrave) struggles for years to develop his new device for use in World War II. Once the bombs are ready to be tested, Wing Commander Guy Gibson's (Richard Todd) squadron must be specially trained to drop the sensitive weapons on Germany's Ruhr Dams. Based on true events, this British film features a legendary grand finale of special effects.