Overview: The Last Alaskans are joined by extended family members, with some members traveling to the refuge by boat for the first time in 20 years. Bob Harte and his daughter, Talicia, embark on a dangerous river journey from Fairbanks to the cabin where she was raised decades ago. Heimo Korth breaks ground on a new cabin with wife Edna, his daughters and grandchildren. The Lewis family journey back to their old homestead, navigating upriver through Alaska's interior on a house boat constructed over the past decade by patriarch Ray. Tyler and Ashley Selden continue to gain experience in the wilderness and contemplate adding a new member to their family. And 19-year-old Charlie Jagow, who was born in the refuge and remains one of the youngest permit-holders there, returns to build his first cabin.