Experts predict a small window of opportunity, so truckers must defy the odds to get their loads delivered or risk financial ruin that will also impact their communities.

At Polar, a truck crashes into a snowbank. Legendary Alex Debogorski makes his return by taking on an untested crossing. The Polar boss tests a new driver. Lisa Kelly encounters a monster incline. Two long-time rivals meet deep in the wilderness.

Lisa Kelly becomes stranded hundreds of miles from the nearest town. Darrell Ward takes a risky off-road short cut that's untested by any other truck. Art Burke comes upon a melting ice crossing and a load that's right at the weight limit. 22-year-old Steph Custance learns whether she'll be driving for Polar.

Darrell Ward and Lisa Kelly head into Alberta looking to expand their company, and encounter a trail called "the Death Road"; Art Burke takes on the ice crossing where he nearly lost his life; Polar's top dog Todd Dewey takes rookie Steph Custance under wing, as she embarks on her first ice-roads journey.

22 year old Steph Custance tries to conquer the first ice roads of her career, but an ice crossing pushes her to the limit. As temperatures rise, Alex Debogorski runs into a road block. Art Burke is acting as a diplomat for Polar by delivering to a new remote community. Darrell Ward braves an unregulated winter road.

Darrell Ward faces off with a trail named "The Obstacle Course". Todd Dewey struggles to clear a melting ice bridge. Veteran Alex Debogorski is pushed to his limits hauling an oversized fuel tank and Art Burke finds an ice crossing in the middle of the night.

Polar driver Steph Custance braves one of the longest ice crossings on the winter roads map and to make things worse, she is all alone. Darrell Ward attempts a triple delivery in a single day, meanwhile Lisa Kelly is stopped dead in her tracks by an engine fire. Todd Dewey celebrates his birthday stuck on the edge of a closed road.

Todd must fix his truck or risk being stranded 100 miles form the nearest town. Alex Debogorski has to cross a creek that has thawed in the middle of the road. On an important run for Polar Industries, Art Burke receives some news that could be devastating. Lisa Kelly battles an ice crossing unlike any she has seen before.

As the end of the season nears, Polar Boss Mark Kohaykewych makes a historic deal with Darrell Ward and Lisa Kelly to team up for a four truck convoy over a closed road. Alex Debogorski must complete one of the longest trails in the final hours to make a delivery and Art Burke's truck breakdowns on the ice.

The four truck convoy faces fire and an ice crossing so thin, they must test the thickness themselves. After Art Burke's engine dies, he must ride back with Alex Debogorski to Winnipeg over a trail that destroys the old pro's truck.

Austin's heavy haul through snow leads to a rookie mistake; Darrell is sorely tested by an infamous pass; Porkchop is assigned an unexpected load; Hugh enlists a motley crew to drive across ice; and a one-lane mine road pushes Alex to the limit.

In the midst of the early thaw, Darrell and Lisa struggle to make it home over the hardest hit trail on the winter roads system. Art and the King of Obsolete reunite to haul a giant double trailer over over a slick path. Veteran Alex Debogorski races against the clock to deliver to a town in need before the road closes, while fellow Polar driver Todd Burke finds a unique way to conquer a melted ice crossing.

As the season opens, the race begins for VP Express and Polar Industries. This year both companies face a much bigger adversary, the Polar Vortex, bringing with it the worst winter conditions in a century. With the storm only days away, it's a race for loads. Lisa Kelly and Darrell Ward return to lead team Polar to victory, while Art Burke and Todd Dewey both set out to prove to the boss that they can deliver with the best of them. Meanwhile, at VP Express, seasoned pros and former rivals Alex Debogorski and Hugh Rowland join forces and head out into the frozen frontier.

Rick makes an unpleasant discovery about his truck; Alex hauls a dangerously heavy excavator; Lane gets out on the road.

Polar Industries has pulled ahead of rival VP Express, and VP boss Hugh Rowland decides to hit the road on his own. Polar scores a lucrative contract hauling million dollar parts for a water treatment plant, but both Darrell Ward and Alex Debogorski face major delays.

The truckers attempt to deliver their loads as a huge storm approaches. Lisa and Art have to deal with a deadly shutdown. Darrell and Todd don't get along and Alex is searching for divine assistance on thin ice.

Lisa and Todd embark on one of the toughest missions of the season, tackling an untamed trail dubbed the `Highway to Hell'. Darrell Ward steals business out from under his former boss at Polar Industries. A crash could mean the end of Alex's trucking season.

In Alaska, the clock is ticking on the Dalton as the deadline to deliver a massive oil rig pushes every driver to step it up to get the job done. Will the pressure of his first ice crossing cause one rookie to crack? Plus, Alex races to deliver a load to a village across an icy river delta, but a looming storm threatens to trap him just inches above the rushing current. And, Hugh and Rick fight the melting winter roads to deliver their first load of the season to Winnipeg, when a rookie mistake leaves Rick in the line of fire.

A huge wreck affects Darrell's aspirations to be king of the haul road; Porkchop tangles with precarious sheer cliffs on an access road; Austin joins the heavy-haul team; and Alex faces obstacles on the ice.

Alex hauls a high-priced load down a dangerous one-lane road; Austin struggles with heavy cargo; Hugh helps a rookie driver who runs into trouble on the ice.

With loads needed to be hauled for their half million dollar contract, VP bosses Hugh Rowland and Vlad "The Mad Russian" Pleskot agree to keep struggling new hire Art Burke aboard. But they bring in new ice road hopeful Todd Dewey to keep freight moving and put pressure on Art to perform. In a convoy with Hugh and Art, Todd is put to the ultimate test as he faces the first ice crossing of his career. After rival Polar Industries snags a deal to haul loads over a newly opened road, Darrell Ward is sent out to test it, but his truck has a problem that could prove to be deadly. Lisa races to get off the winter roads and back into the load count battle with rival VP Express. While Alex Debogorski retraces his steps over the deadly Shamattawa trail with a giant forklift, knowing a successful delivery will help Polar hold off his old rival Hugh.

The battle gets down and dirty as the roads melt beneath the drivers' wheels. Art Burke fights to keep his rig above ground on a melting ice crossing, while fellow Polar driver Alex Debogorski fights his way up a mud covered mountain. Renegade rivals Lisa Kelly and Darrell Ward struggle on a trail at ground zero of the thaw, where getting stuck could sink their company for good.

The ice is right? After two short seasons, the drivers are ready for what is forecast to be a cold and busy winter. But the tragic passing of legendary driver Darrell Ward leaves the community of drivers wondering who can take his place.

The Alaskan DOT races to stop potentially dangerous overflow from wiping out the Dalton and its truckers. Meanwhile, as the season nears its end, the truckers team up for safety, Hugh gets busted for speeding and Jack and Lisa come across an overturned rig.

Austin spends a night in a ditch; Jack is forced to remove two wheels from his trailer; Porkchop is pulled off the road by Lane; and Hugh and Rick brave melting roads with a heavy load of two cement trucks.