Killer Instinct: Morgan takes to higher ground to protect his food supply, while Rich goes on the hunt for a dog-killer. (S5, ep 8)

Hunter and Hunted: Tom defends his home against a wolf pack. Eustace attempts to turn trash into treasure, and Jason goes on a mission to feed his family. (S6, ep 7)

Freeze Out: A jackpot slips from Tom's grasp; Morgan's last ditch effort to find food takes him into the treacherous peaks; and Marty is driven off his line. (S5, ep 7)

Let the Weight of the Hammer do the Work: Marty's retreat leads to a surprise in his own back yard. Morgan builds to beat the deep freeze, and Tom hits the jackpot. (S6, ep 6)

The Surge: As winter strikes, Morgan hunts for riches in the ruins, Jason tackles a river giant and Eustace makes a breakthrough with black powder. (S6, ep 5)

Hard Luck: Morgan faces a gauntlet of frozen river crossings to get home, Tom strikes out, and Marty's season begins to unravel. (S6, ep 4)

Labour Pains: In a risky bid to get out of the red, Marty fights to reclaim his long-abandoned turf. Morgan races to build a shelter in the snow and ice of subzero Alaska. (S7, ep 3)

Breakage: Morgan battles to stay afloat on a treacherous river run, Jason loses everything, and for Rich's dog team, routine training turns to live combat. (S6, ep 3)

Time and Tide: The bears keep Morgan on the run as he tries to secure his catch and escape with his life. Eustace struggles to get back to work without Preston. (S7, ep 2)

Edge of Winter: Morgan races the ice to gather critical supplies, Eustace digs out from a devastating tornado, and Marty takes to the air in a risky bid to win the season. (S6, ep 2)