Marty returns to his trap line to find it destroyed by wildfire. Mike hunts an elusive herd of Kodiak elk. Lauro and Neil Eklund journey down the Yukon River by log raft on a quest for beaver and fish. Cub prepares for a winter of isolation at his remote coastal cabin. Bret and Ivy traverse a risky shortcut, and uncover a prize set of moose antlers on their Alaska Range trap line.

Marty instructs his teenage daughter, Noah, as she pilots the bush plane. Mike hunts a herd of Kodiak bison, and donates the meat to friends in town. Lauro and Neil check their traps and fishing nets on the Yukon River. Cub forages for shellfish and edible plants. Daniel sails through stormy seas while on a deer hunt to feed his family of six.

In the interior, Marty Meierotto puts the stalk on a group of caribou, but the hunt takes a wild turn when a family of grizzly bears comes charging toward his camp.

Marty embarks on a moose hunt, luring a bull within his sights; Mike's relentless pursuit of foxes yields a collection of prize pelts; as Bret sets his sights on trapping wolves, Ivy balances duties at the homestead.

Marty has a near death experience when he plummets through ice on a frozen waterway; meanwhile, Lauro journeys deep into the untouched backcountry by dog team to establish an expedition camp.

Buried under record snowfall, Marty fights to heat his cabin and maintain his trapline; Lauro and Neil brave the icy Yukon River with their sled dogs, while Mike ingeniously crafts a driftwood windmill to power his homestead.

Marty digs his bush plane out from a deep snow drift to preserve his one lifeline in the bush; Bret and Ivy escape an avalanche from their cabin roof before embarking on their journey back to home base.

Marty escapes a blizzard and flies home from the trapline to reunite with his family; Lauro runs a 100 mile dog race and gets closer to qualifying for the Iditarod; Daniel takes down a black bear to provide meat for his family.

Lauro kicks Iditarod training into high gear with a 300-mile run on the Denali Highway and Bret.

Mike braves icy waters to catch snow crabs living on the seafloor hundreds of feet below the surface.

Marty withstands a brutal cold snap and Mike carves a narrow road out of a steep ridge.

Lauro begins the 1,000-mile Iditarod with his sixteen-dog team, pitted against harsh conditions and rugged terrain in one of the toughest races on earth.

Lauro continues his quest to complete the Iditarod through Alaska's frozen interior and Bret and Ivy pursue a bear into dangerously steep terrain.

Lauro confronts -40° weather, a broken sled and exhausted dogs on the Iditarod Trail while running down the frozen Yukon River. Bret and Ivy haul beaver to finish the season and Tom and Jack carve a traditional peace pipe from rare catlinite stone.

Lauro nears the end of the Iditarod, crossing 260 miles of ice along the Bering Sea coast to reach the finish line in Nome. Marty and his friend Dave haul supplies for a cabin into the backcountry and Tom and Will build an elk hide tipi.

Marty guides Noah through her first bush plane landing at a remote caribou camp while Mike hauls a 50-foot gangway across land and sea to his Kodiak homestead.

Marty flies to new hunting grounds in search of an elusive caribou herd and Lauro and Neil build a trapping and fishing camp to help feed their sled dogs.

Chance and Soraya slaughter a ram to provide meat for their growing family while Lauro begins preparation for this year's Iditarod by taking his team on a fall training run.

Bret and Ivy bust through sheets of lake ice to ferry critical equipment to their cabin by boat and Lauro and Virginia use the dog team to haul fresh cut timber from the forest for a log cabin build.

Lauro guides his dog team through frozen wilderness to reach Neil at a remote trapping camp. On his homestead, Mike digs a root cellar into the hillside. Ivy hunts grouse while Bret preps for the upcoming season by building and boiling his gear. Chance and Soraya begin building a log barn to shield their livestock from winter. In Montana, Jake makes a daring climb to save one of his stranded dogs.

While hunting for meat, Mike crosses paths with a prowling brown bear and her cub. Chance races the first snow to finish his livestock barn. Lauro and Neil smash through thick river ice to harvest beaver and fish. Bret and Ivy scale their cabin roof to install solar panels and power their homestead with clean energy. Meanwhile, Paul hits the jackpot on his coyote and beaver traplines.

Mike journeys to an uninhabited island to hunt a herd of wild buffalo with help from the local natives; Lauro pushes himself training for the upcoming Iditarod with a grueling 260-mile run through the Alaskan wilderness.

Lauro begins the longest Iditarod in the history of the famous sled dog race; Mike hunts elusive and rare silver foxes along the shoreline of Kodiak Island; Chance works to support his family through sub-zero temperatures on the trapline while Soraya prepares for the imminent arrival of their new baby; after a lifetime in the wild, Tom finally contemplates retiring from trapping; Jake has a terrifying day when his dog takes a 50-foot dive from a tree.

Lauro travels north with his team of sled dogs to hunt caribou; Daniel rebuilds a cabin.

Marty searches for a bull moose that vanished in thick brush; Mike packs the meat from a bull elk.