Winter descends on the mountains without mercy; Marty is trapped in 50-below weather; Morgan and Tom forge new alliances; Rich battles a rogue grizzly.

Morgan races the ice to gather critical supplies; Eustace digs out from a devastating tornado; Marty takes to the air in a bid to win the season.

Morgan fights to stay afloat on a treacherous river run; Jason loses everything; routine training turns to live combat for Rich's dog team.

Winter strikes and Morgan hunts for riches in the ruins; Jason tackles a river giant; and Eustace makes a breakthrough with black powder.

Marty's retreat leads to a surprise in his own backyard; Morgan builds to beat the dangers of the deep freeze; Tom hits the jackpot.

Tom defends his home against a wolf pack; Eustace attempts to turn trash into treasure; Jason goes on a mission to feed his family

A slip of an ax blade slices Morgan too deep; Marty targets a wolf pack on a killing spree; Tom digs out.

Morgan is sidelined while he gets back on his feet; Marty fights to stay in the game; Eustace makes a critical trade to protect his future.

Marty doubles down on a new strategy to keep from losing more ground; Morgan and Margaret defend what's theirs; Jason's hunt for land becomes an ordeal.

Marty fights for every last dollar as his season goes into free-fall; Eustace and Preston experiment in barnyard engineering; Jason gets locked out of a new home.

An early thaw puts Morgan's supply drop on thin ice; Marty hunts the beasts of Kodiak Island; Tom makes the most of his unprecedented winning streak.

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An early melt unleashes the bears weeks ahead of schedule in the Great Alaska Range; Jason's hunt for a home is finally over, while Eustace and Preston's race to the finish line ends in ruin.

Morgan's horses go missing just as the local bears wake for spring; Rich's marathon lion hunt turns into an epic chase; Tom goes after America's largest game.

Marty ends a failed season with a blockbuster catch; Tom stands his ground against a powerful beast; Preston and Eustace fight fire with fire to lay down roots for the next generation.