It's the adventure of a lifetime when "The Biggest Loser" contestants are whisked away on military trucks to Camp Pendleton, where they will live and train like Marines for the week. There, they hit the ground running with a fast-paced week of activities led by a select group of Marines. It's non-stop action, from hiking with oversized backpacks to early morning rifle exercises to an intense obstacle course challenge that pits blue team vs. black, with a prize the players want now more than ever. While some struggle with the physical challenges and the adjustment of being away from the ranch, others thrive, and one even shaves his head to be just like the Marines! Later, the players meet up with trainers Bob Harper and Jillian Michaels at the Camp Pendleton gym for a Marine-style last chance workout, and then a weigh-in full of surprising numbers is followed by another player being eliminated.