The Biggest Loser S07E19 - Running a Full Marathon!

First, the final four contestants - Tara Costa, Mike and Ron Morelli and Helen Phillips head home for 30 days. After heartwarming reunions with family and friends, they try to get back into their routines but find it challenging to make diet and exercise a priority back at home. Adding to the challenge is the news from host Alison Sweeney that when they return to the ranch at the end of 30 days, their final challenge will be their toughest one yet - running a full marathon. Trainers Bob Harper and Jillian Michaels make surprise visits to the finalists to help steer them back on track.