Dropped deep into a hostile rainforest, Bill and Gary's teamwork and survival skills are put to the ultimate test. In just three days, their journey pits them against swollen gullies, swampy bogs, and a waist deep drive across a deadly river.

Dropped onto the peak of a frozen volcano, Bill and Gary must navigate their car over deadly crevasses, fatal ice fields, and through razor sharp lava slopes - all the while protecting themselves and the car from freezing temperatures

Stranded in an unforgiving mountain range, Bill and Gary have to drive their car across boulder fields, where the threat of landslides looms. Forced to repel off a 60-degree cliff they must now overcome a 600ft drop where one slip could be their last.

Helicoptered into the world's driest desert, Bill and Gary scale 10-story high sand dunes and 50-degree slopped sand bowls. Gary, under constant pressure, explores techniques to stay hydrated, while Bill struggles to keep their car and challenge alive.

A behind-the-scenes look at the series. Included: interviews; never-before-seen footage; tips for off-road driving.