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.

Jake and Waz build a dam in frigid waters and Gabby risks hypothermia.

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.