In the few weeks after Canada declares war on Adolf Hitler's Third Reich, more than 60,000 Canadians volunteer to fight for King and Country. In the Battle of Britain 100 Canadian fighter pilots - including Robert Barton - play a key role against swarms of German fighters and bombers. Seaman Peter Cock takes us through the fight to save "Slow Convoy" SC-42, attacked by a wolf pack of German U-boats in the Battle of the Atlantic.