
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.

Jack rushes to save an Alaskan town with an emergency fuel delivery; Lisa gets her big chance to step up when she's given her first oversize load; Ray takes a night run as a favor for the boss; Alex's trash talk stirs the sleeping Polar Bear.

The pressure on the drivers builds as the temperatures plunge to 55 below; Jack gets into it with a southbound driver; Hugh gets an earful from an American driver; Alex picks up a hitchhiker; Ray takes on Atigun Pass.

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.