Peter O'Toole stars as Murphy, sole survivor of a ship torpedoed by a German U-boat at the close of WW2. He generates a lot of hatred towards the Germans and sets about to extract revenge for his fallen comrades. This is a story of hatred gone ballistic and obsession for revenge. It seems that Murphy has gone mad. Towards the end of the film, a means to get his revenge becomes available and he sets out to kill the U=boat. Will he succeed? A very good film!