In the autumn of 2011, almost exactly forty years after its release in 1971, and after an extensive search with many people involved, possibly the last surviving copy of this long-lost canal-thriller was finally found somewhere in America. The movie was then shown by the Braunston Cinema Club in early December to two packed houses at Braunston Village Hall, in the presence of its co-star Gayle Hunnicutt. It was a cinematic night to remember. Tim Coghlan was there…