Thunderstone

Tao has plans for the truck known as The Beast. The Nomads are still trying to reach the safety of the mountains via the 'deep road', meanwhile Noah has discovered that he is actually in North Col, but instead of being in the past he is in the future year of 2085. Sundance returns to the camp with Noah's PHD and he figures out that to go back home he with need to same kind of energy that was first needed to transport him. The only thing which Noah sees to have that power is the thunderstone.