All 16 episodes from the fourth season of the History Channel reality series following the daredevil truckers paid to take equipment and supplies to mines in Canada's Northwest territories across treacherous frozen lake highways. Episodes are: 'Breaking Through', 'The Polar Bear Returns', 'Facing Down the Below', 'Storm Over Atigun', 'Trapped On Thin Ice', 'Danger at 55 Below', 'Avalanche!', 'Lisa's Monster Megahaul', 'Blood On the Dalton', 'The Ace vs the Ice', 'A Rookie's Nightmare', 'The Dalton Strikes Back', 'Convoy to Hell', 'A Legend Meets His End', 'Deadly Melt' and 'New King of the Dalton'.