HISTORY | 9:33 pm

As their environment continues to attack any remaining sense of resolve among the survivalists, the final four are reaching advance stages of extreme fatigue and malnutrition in the new episode "All In." Some participants simply hunker down and struggle to power through any way they can, while others search for calories anywhere they're available. As the challenges grow ever more severe, however, everyone still in the competition faces the possibility they'll be forcibly extracted by the show's production team.