Jeremy battles rising rivers in search of old growth timber for Neil's lumber project; at the Mother Lode, Neil gambles the entire project on excavating a new entrance; Jenny prepares to bring new life to McCarthy.

Old Man of the Mountain Tim Mischel sets foot on McCarthy soil once again; the Nizina river threatens Jeremy's hopes of growing his farm; a shortcut to the hidden city in the mountain brings McCarthy closer to becoming a major tourist attraction.

McCarthy mainstay Mark seeks out a rare local treasure to welcome home old timer Tim; at long last Neil opens the Mother Lode mine to the public for tourism, but his partnership with Jeremy puts the Keller family's future in the town at a crossroads.