After several impressive runs this season, Lisa takes on a big haul of high explosives. Meanwhile, harsh icy conditions southbound on Atigun Pass cause Jack to spin out for the first time this season.

As the "Dash for the Cash" comes down to the wire, legendary driver George Spears calls it a career, Lisa makes a harrowing 300-mile run with no brakes, and polar bears shut down the Ice Road.

Another winter storm causes a major collision on "Slope Mountain" and tow truck driver Ben Krsykowski must carefully pull a truck cab and trailer back up on the road--knowing that the slightest spark could set off a massive explosion.

The race is on to make it to Prudhoe before a wicked storm turns fierce. Despite a cloud of ice fog, Hugh and Phil make it through the worst of the storm and celebrate at the top of Atigun Pass.

Lisa Kelly auditions to be the first woman to break into the elite Heavy Haul division while Hugh "The Polar Bear" Rowland aims for the title: master of the all the North American ice roads.

Record snowfall mixed with now warmer temperatures has turned Atigun Pass into a devil's slide - slippery than ever and at an all time high for avalanche risk.

With just three weeks to go, everyone is pushing it to the limit to get the freight to Deadhorse before the season ends. Lisa convoys north with Jack Jesse while Tim and George are delayed in Fairbanks.

A volcanic eruption in Southern Alaska sends Jack Jesse racing up to the North Slope with the first load of diesel reserves. Meanwhile, a major mechanical breakdown leaves Lisa stranded without heat in the frigid temperatures.

Day 1 of the new Ice Road season brings 6,000 loads of freight to move in just 12 weeks to the oil camps of Alaska's North Slope. From unexpected weather and treacherous terrain, this is by far the most death defying route to date.

With only two weeks left Alex is determined to take the lead. He immediately takes a back haul assignment, but the load isn't strapped securely and threatens to fall off.

Temperatures drop to 70 below as the race for big bucks heats up. Truckers Lisa Kelly faces hurdles, Jack Jesse deals with the perils of hauling a load of 130-foot pipe and rookie Tim Freeman struggles with challenging mechanical problems.

The clock is ticking and an arctic storm is brewing. Hugh and Alex embark on their first trip to Prudhoe Bay, Lisa Kelly requests her first ever "heavy haul," and Tim Freeman makes his second attempt to navigate the ice road.

A massive storm blows in and all traffic on the ice road comes to a standstill. George, Tim and Lisa take shelter at Coldfoot while Jack Jesse tries to outrun the storm.