Hitler's submarines, his "Grey Whales" made their first apperance in 1939 and by 1942 had brought the Allies to the brink of defeat. Chruchill would later admit, "The only thing that ever really frightened me during the War was the U-boat peril." At the most desperate hour, the capture of an Enigma machine and the invention of radar would prove intrumental in turning the battle, and therefore the war, around. This three-part series includes eyewitness accounts from former U-boat crew members, members of the Royal Navy and fascinating images of U-boats in action, along with dramatic reconstruction, to bring this crucial struggle for control of the "saltwater highways" into focus. Color with B&W footage, stereo, Approx. 146 minutes |