An incoming storm threatens to cut the siblings' Alaska trip short.
Billy rallies the family toward the next stage of North Star Ranch.
The Wolfpack questions the future of their dream after a ruinous wildfire.
Bear meets son River for the first time and Bird contemplates a journey.
Bird, Bear and Rain return to Alaska to reconnect with their bush past.
The Wolfpack grieves a loss while building a new "Boomtown" basecamp.
Young father Bear welcomes River to North Star for the first time.
The Wolfpack faces difficult next steps after the death of Billy.
The Browns salvage 80-tons of old mining equipment as gold fever strikes.
The Browns meet their match bringing salvaged mining equipment to life.
The Wolfpack celebrates Billy but some question the future without him.