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.