

Ed Stafford challenges ultra-fit ex-Marine and ropes expert Aldo Kane to a race across the tangled wilds of Borneo's crocodile-infested mangrove swamps.

Ed flies to Kazakhstan to take on ex-South Korean special forces soldier KhenRhee, where he encounters life-threatening navigation errors.

Ed Stafford heads to the deadly Gobi desert with endurance athlete Matt Graham, where the pair face sand storms and extreme dehydration.

Ed races through northern Thailand against ex-military survival legend EJ Snyder, but the competition almost takes a fatal turn when one of them tumbles off a cliff.