
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.

Lisa tries out for the Heavy Haul division by hauling 80-foot sections of wide-gauge pipe on a 600-mile run; a 500-mile race between Hugh and Alex; Tim's truck breaks down.

Tim and George run into a storm 25 miles from Deadhorse; Lisa is forced to stop in Coldfoot because of the storm; Hugh and his convoy partner have a barbecue in the snow at the top of Atigun Pass.

A massive wreck prompts Darrell to question his reasons for being in Alaska; Porkchop gets his shot to prove himself with a solo run to a remote Alaskan village; Austin finally joins a heavy haul team; Alex faces the Dempster in reverse.

Austin tries to prove himself in a heavy haul convoy; word of Jack Jessee's return gets Darrell Ward on the road early; Porkchop gets an unexpected load; Hugh drafts a ragtag team of drivers into a convoy across the ice.