Tom goes for one final ride on the trapline to pull his last sets before passing the torch to Sean and Hank; Jake has a showdown for the ages when three lions are cornered in a single tree; Marty makes a last ditch run at the wolverine that has decimated his trapline all season; Lauro explores the Arctic sea ice by dog team and hunts caribou on the frozen tundra; Mike races to rebuild his cookhouse in the wake of a devastating bear invasion.