The last days of winter bring change. The future of town lies in the balance. Jason races the melting river crossings to reach his crashed airplane. Jeremy tests his nine-year-old son with a risky solo dog sled run through the woods.

As seasons change in McCarthy, the town is haunted by its darkest day. The icy ground thaws into a quagmire, and old-timer Tim Mischel is marooned at his remote cabin. Neil and Jeremy’s frozen truce is set on fire.

With spring arriving, the residents of McCarthy can get more supplies.

Residents of McCarthy, Alaska deal with wild bears and stubborn neighbors.

Neil Darish wants to open the world's largest man-made ruin in McCarthy.

Neil wants an electrical grid in McCarthy but Jeremy plans to stop it.

A town meeting erupts over Neil Darishs' power grid in McCarthy, Alaska.

The 42 residents of McCarthy are choosing sides in the battle to draw visitors to this historic frontier town, but when a pack of wolves begins stalking the streets of downtown, locals must unite to protect their way of life.

McCarthy could be opening to the outside world and residents are concerned.

The hidden city inside the mountain is within reach but exploration means convincing locals for help. Temperatures drop to 40 below, threatening ranchers trailblazing the frozen tundra, and an emergency meeting is called to defend the frontier.

As winter nears its end, Gary Green and Jenny Rosenbaum hunt for food.

McCarthy, Alaska, residents are divided over a new treaty that has failed.

Experts look for the only known entrance to a mine in McCarthy, Alaska.

Neil breaks through to the Mother Lode Mine while Jenny hunts down a bear.

Neil Darish develops his mine tour and one resident fights for their life.

Neil Darish is on the brink of re-opening the Mother Lode Mine for tourism.