As race four finishes, unexpected events turn the whole competition on its head.

Seven teams commence race 3, but injuries jeopardize their progress in the competition's first half.

A non-stop race tests the limits of the five remaining teams.

A potential double elimination threatens the six teams left as they fight to survive race three.

Contestants in a race strive to complete challenges and gather scarce resources at a survival camp, resorting to any means necessary to outpace their rivals.

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After a shocking exit, the remaining three teams must prove worthy of winning the grand prize.

Desperate for food, eight teams battle starvation and brutal weather at the start of race two.

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.

The most harrowing competition show ever attempted returns as nine teams learn that New Zealand’s deceptive beauty packs a vicious punch.

The first team is eliminated as the remaining competitors must survive the unforgiving wilderness.

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.

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.

The final three teams compete in the brutal, exhilarating climactic push for the $500,000 prize.