The five remaining workers go to the heart of the Alaska range, Denali National Park. For over 100 years, adventurers have traveled there to climb Mt. McKinley, North America's highest peak. Since 1976, over 700 climbers have required rescue and 100 have died. Temperatures drop to minus 100 degrees Fahrenheit and winds regularly reach 100 miles per hour. The difference between life and death on Mt. McKinley is a guide; the next job the contestants will take on. To get there, they land directly on a glacier in a small plane.

• Thom Beers

• Josh Temple