This film is an account of the Talyllyn Railway, a historic narrow-gauge slate carrier in Tywyn, Wales, and its operation by a preservation society who saved it from being sold for scrap. Although the release date is 1965, it was actually filmed in the early 1950s. Preserved by the Academy Film Archive in 2012.
The story of the conception of a new British weapon for smashing the German dams in the Ruhr industrial complex and the execution of the raid by 617 Squadron 'The Dam Busters'.