
Truckers with nerves of steel take their lives in their hands driving heavily loaded vehicles across frozen lakes to deliver supplies to remote locations in Canada and Alaska. Whether they're bringing supplies to Canadian diamond mines, supplying offshore oil rigs in Alaska or even charting new territory driving over frozen swamps and rivers to bring much-needed supplies to small towns, these extreme truckers face troubles from their machines and from Mother Nature.

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Jack is left stranded and helpless by an avalanche; Ray faces Dalton with a premonition of death hanging over his head; Hugh drives on the wrong side of the road over Atigun pass.
Lisa tackles the most dangerous haul of the season, trucking a multi-million dollar, 100 ton load across the entire state of Alaska; Alex races to keep pace in the load count; Greg could be a hero of the road; Ray faces the worst night of his career.
It's chaos on the Dalton when a truck flips off the road and smashes into a tree; Alex is thrust into the turmoil and faces tough questions from state police; a careless mistake may rob Lisa of hard-earned respect; Greg fights for his job.
Jack Jesse must survive the arctic wilderness and cross a frozen river alone to reach the isolated town of Bettles; Lisa Kelly is back in action, but the slippery slopes of the Dalton will make her road to redemption a dangerous one.