
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.

Hugh's trailer brakes go out; Todd Dewey gets sent on a solo mission behind Hugh; Art must watch the action from the sidelines with his truck in the shop; Darrell has truck problems that delay his trip; Alex is forced to leave a day late.

Hugh and Rick roll deeper into the Canadian outback; an overflow may leave Alex stranded; Dave's training run with Tony reaches the boiling point; Lisa goes on a rescue mission; Maya takes her first look at the haul road.

Dave's hot temper may cost him his second and final shot; Maya fights to prove she belongs behind the wheel; Tony visits the scene of the accident that nearly cost him everything; Lisa gets a shot to redeem last year's biggest failure.

Hugh and Rick haul the biggest load ever on the Canadian ice roads; Alex fights a massive oil leak; two Dalton newcomers finally head up the highway; Dave Redmon is finally alone in the truck.