Tough Guy or Chicken?

High in the Ecuadorian Andes, five adventurers join the local cowboys and battle with fighting bulls.

In the Siberian arctic, the five adventurers attempt to become Evenki reindeer herders and must guard the herd from wolves.

The five adventurers head into the jungle of Mexico's Yucatan peninsula and become cave-divers in a vast network of largely uncharted, pitch-black, underwater tunnels.

The adventurers join boys of the Jaminawa tribe in the Brazilian Amazon and endure a jungle initiation to become men, involving hallucinogenic brews and sacrificing a snake.

In Namibia, the five adventurers join the Ju-Wasi tribe of San Bushmen on a traditional hunt in one of the most inhospitable environments on the planet.

In the Bahamas, expert Jeremiah Sullivan has the task of turning the rookies into shark wranglers in just six days. Reuben is not sure he's prepared to risk losing a limb.

The lads' penultimate challenge could be the most deadly, as they come to Bangladesh to learn to catch venomous snakes under the aegis of snake king Shoporaj Dholu.

The lads' final challenge is to become Buddhist Yamabushi monks and complete a tough pilgrimage to the summit of a sacred mountain, under the eye of Miyagi-San, their Master.