With the defeat at Stalingrad, the belated need for total mobilization was accepted by Hitler and the slack in German productive capacity was taken up in an attempt to produce the equipment needed to service a wider and much longer war. A new program for increased production was introduced - 27 Type VII boats a month by the end of 1943. However, it was already too late for the U-boat arm, for the allies had moved to close the gap. Large numbers of long-range aircraft, new radar, new weapons and new tactics served only to raise U-boat losses in the Atlantic after mid-1943. This final chapter of the 'Grey Wolves' war is told with fascinating footage covering all aspects of this story. It ends with film of the one man 'Biber' submarine, and the arrest of Doenitz in 1945 - Hitler's nominated successor and Germany's last Fuehrer!