Mystery of Dead Mountain

For the first time, one of American history's greatest undiscovered artifacts is revealed -- an 1865 image of Abraham Lincoln on his deathbed. Now, Professor Whitny Braun is on a mission to determine the authenticity of the photo.

With winter approaching, the Kilchers pin all their hopes on one hunt.

The entire homestead rushes to prepare for the first storm of the winter.

Family members search for a newborn calf and its mother during a snowstorm.

Desperate for food, the Kilchers struggle to get through a harsh winter.

Spring arrives and the family deals with a rogue hen and hunts for food.

The family battles danger to drive their cattle to the summer pasture.

Atz begins range riding to protect Otto's cattle herd from predators.

The Kilchers call in favors to help build a fence before the high tide.

The Kilchers fish for the hundreds of pounds needed over the winter.

Atz Lee and Eiven travel to "Terrible Island" to hunt deer.

Fall arrives and the Kilchers scramble to finish their winter preparations.

Otto's sense of humor and ingenuity inspire his family and neighbors.

The Kilchers must not only reuse and recycle, but also reinvent.

Atz Lee and Jane head to remote Adak Island in search of Caribou.

Otto and Charlotte defend against the homestead's first predator attacks.