More than halfway through the Race, even the strongest are pushed to their breaking points. In Canada, the team faces a frozen uphill battle. In Thailand, the team's weaknesses are exposed. Team Russia adventures into dangerous territory. And Team South America fights against injury and fear.

Around the globe, teams are pushing toward the end of stage one. In Canada, a horseback ride takes a dangerous turn. In Malaysia, Team Southeast Asia battles a jungle labyrinth. In Russia, an injury plagues the entire team. And in Chile, civil unrest throws an unexpected wrench in Team South America's journey.

After 13 gruelling days racing in their separate corners around the world, the four teams converge at the final destination for an epic head-to-head battle, where just one will walk away with the million-dollar prize.