Just hours into the race, Alaska takes her first victim when a contestant is evacuated.
During a brutal introduction to Survivor Camp, racers must live off the land to keep racing.
A racer falls ill after a steep climb while another gets snared in ropes during a cliff rappel.
Alaska claims another victim when a racer falls in the rainforest, suffering a debilitating injury.
After a dangerous bear encounter and a fall down a cliff, Alaska sends another team home.
Bears force a team off track; a crucial choice could propel another to first place or over a cliff.
One team risks rations, braving the frigid waters to catch food while Alaska sends another packing.
Caught in a biblical storm, teams stare down hypothermia during a frigid night in the woods.
One team gets lost paddling an icy labyrinth while another exits, revealing the final three.