Journey back to the volcanic Nunivak Island in central Alaska. The explorers will split up into three groups, and two hunting parties will scour the island for sustenance while one will build a base camp focused on food preservation. Mountain man Marty Raney and his son Matt are still searching for fish but after three days with no luck, the team is going hungry. With Marty seriously ill and unable to get out of bed, it's up to his son to turn their luck around and bring back food.
Source: National Geographic Channel