Chris Wilkes

With teams reuniting, they dive into the difficult task of surviving and feeding two people instead of one; the last hiker faces a brutal mountain climb that could dash hopes of ever making it to camp.

As their teammates try to set up camp, the hikers discover Vancouver Island is even more punishing when on the move. One pair is beaten into submission, while another faces a devastating accident.

Ten survivalists make their return for a chance at redemption in the precarious parts of Northern Mongolia.

The three final teams face their most challenging time on Vancouver Island yet, as tensions build and one contestant is forced to battle a blazing fire.

The remaining teams rush to avoid freezing flood waters as Vancouver Island is hit by torrential rain. As one team undertakes a large construction project, another needs to choose between betrayal and retirement.

A behind-the-scenes look at season four, during which seven pairs of family members are dropped off miles apart on Northern Vancouver Island, and an introduction to the teams with an analysis of what it takes to make the cut.