The six truckers are introduced and hit (and slide on) the road. Included: a jackknifed truck halts traffic.

Jay hauls a 17-ton water tank; a traffic jam brings travel on the road to a stop; and Hugh and Rick compete to see who can get the highest load count of the season.

An Arctic storm hits and forces a road closure; and Alex transports a 44,000-pound diamond-ore crusher.

Veteran driver Jay Westgard delivers a 30-ton load of water purifiers to the DeBeers Diamond mine, a weight that could stress the ice, while worrying about his sick 15-month-old daughter, who has pneumonia. Elsewhere, Drew Sherwood's truck needs repairs after the battery box breaks off on a difficult run.

A fuel tanker overturns, blocking traffic and posing a threat to the environment if the fuel contaminates a river that supplies water to an outpost. Also: blowouts as a result of speeding.

Jay attempts to haul a 95,000 pound diamond-ore cutter across a lake of ice; a safety inspector investigates an accident that involved T.J.; Rick runs the risk of getting frostbite when he drives without heat in his truck; Hugh witnesses a fuel tanker go through the ice.

Alex tests a new road; Drew runs out of gas and his truck freezes by the side of the road; and T.J. is overcome by pain from a previous injury.

A convoy of five trucks attempts to deliver supplies to the mine during an arctic storm, and T.J. gets separated from the group. Later, the road is shut down, leaving some drivers stranded at the mine.

Alex's convoy transports a 100-ton electrical unit, the largest load ever hauled on the ice; Rick fears that he has frostbite and is driving in a truck with no heat; and T.J. heads out on ice that is beginning to melt.

Spring's warm weather leaves only the most daring truckers on the melting ice, and Alex and Hugh are competing for the top load count.