With winter coming to a close, the Kilchers spring into action preparing the homestead. Eivin and August struggle to resupply the head of the bay. Jane and Eve embark on a ptarmigan hunt. Atz Sr. and Atz Lee build a weather station on Perl Island.

To prepare for the spring cattle drive, Atz Lee, Otto and August survey the homestead for signs of bear and employ modern surveillance to track their movement. Eivin and Eve take the kids on a kelp-harvesting expedition and Atz Sr. goes bear hunting.

While collecting coal on the beach after a storm, Eivin & Eve find a capsized boat and immediately begin looking for survivors. Otto, Charlotte & August build a shelter for their calves and Jane brings the family together with a new spring tradition.

With predators stalking the homestead, the need for safe cattle grazing land is greater than ever. Atz Sr and Atz Lee head to Perl Island to begin plans for new pasture, while Otto and Eivin work to transport a small herd to the island by boat.

When Jane and Charlotte get word of a sick calf at the Head of the Bay, they trek through bear country to protect their herd. Three generations of Kilchers build a line shack on Perl Island, and Otto has a surprise for Charlotte.

Things get explosive when the Kilchers expand a road on their homestead with detonation expert Desmond Duffy; Jane and Charlotte get stuck in the mud on a fishing trip; Atz Sr. and Bonnie brave the back country to salvage vital resources.

In the midst of Thanksgiving preparations, a baby seal needs help getting back to its family in time for dinner. Later, Eivin and August engineer a hay baler that will literally take a load off their backs.

The Kilchers navigate their newly blasted road for the first time, hauling a huge pole barn up the hill and across the homestead. Eivin and Atz Sr. get tangled in a mooring line as the tide comes in, pushing Eivin's boat towards the rocky beach.

The Kilchers' backcountry winter wonderland celebration is threatened when unseasonably warm weather brings rain to the homestead. But it's not the first or last time that the family must cope with chaos on the homestead.

While fishing, Eivin and Eve discover a tangle of old nets choking the river and launch a risky clean-up operation. Charlotte and Otto rebuild a rotting deck, while Jane and Jewel process fresh milk. Later, the Kilcher family is tested by Mother Nature.

Honoring tradition and the ways of the past, the next generation of Kilcher men venture out on their first big game hunts. Later, the family rushes to complete unfinished projects before winter's arrival.

Otto unearths and restores a homestead relic once used by Yule Kilcher himself. Jane is dropped into the harsh and unforgiving Arctic Circle with only a rifle and a backpack in her first ever solo hunt.

Eivin guides August on his first-ever deer hunt, and Etienne goes on his first big game hunt. Plus, Atz Sr. and Otto attempt to reassemble a historic barn.

The Kilchers get busy on outdoor projects to prepare for the winter months. Atz Sr., Eivin and Nikos scavenge for lumber while Atz Lee and Etienne mill wood.

Eivin and Eve build an epic homestead-style treehouse. Atz Lee, Jane and Etienne stock their freezers with trout while Otto and August refurbish an old tractor.

Jane heads to the Arctic Circle hoping to bag a caribou before winter. Meanwhile, Otto, Eivin, Charlotte and August wrap up the season's final cattle drive.