Twelve elite survivalists venture to Montana's sub-zero conditions in the Rocky Mountains.

Waz and Jake risk hypothermia to dam a frigid stream for trout fishing.

Scrambling from the start, 12 elite survivalists take on their harshest location yet, the sub-freezing Rocky Mountains of Montana. Jake injures his feet during insertion but tries to push through. Severe dehydration puts a survivalist's challenge at risk.

Snowstorms test the survivalists' will leading to a leadership change.

Wes confronts Sarah and a mountain lion stalks the survivalists.

A grizzly bear mauling leads to a frightening search-and-rescue mission.