[s4e1] Alone -

The premiere, which aired June 8, 2017, focused on the immediate physical and psychological toll of the new rules.

One partner was dropped at a designated beach camp site, while the other was dropped approximately 10 miles away in the dense, predator-heavy interior. [S4E1] Alone

The "hiker" had to use only a compass and a bearing to trek through some of the world's most unforgiving terrain to find their partner. The premiere, which aired June 8, 2017, focused

Shannon (part of a father-son duo) suffered a severe fall on wet seaweed and logs, injuring his back and reporting a loss of sensation in his feet. which aired June 8

In this "Lost & Found" edition, teams had to navigate a high-stakes reunion before they could even begin building a permanent base.