The British The Dam Busters is the story of the development and utilization of the "bouncing bombs" in World War II. Michael Redgrave stars as Dr. Barnes Wallis, who developed these unorthodox explosives. Wallis' invention is put to practical use during the British raid on the Ruhr Dams in Germany. Most of the film is devoted to the two years spent in creating the bombs and training the pilots; the final sequence is a special-effects masterpiece, even allowing for the obvious models standing in for the dams. Adapted by R.C. Sherriff from both Guy Gibson's book Enemy Coast Ahead and Paul Brickhill's The Dam Busters, this film was Britain's biggest box-office success of 1955.
~ Hal Erickson, All Movie Guide