PAST SEASON "BIGGEST LOSER" WINNERS, INCLUDING MICHELLE AGUILAR AND ALI VINCENT, CHEER ON THE FINAL FOUR AS THEY FACE THEIR TOUGHEST CHALLENGE YET � RUNNING A FULL MARATHON ON NBC'S "THE BIGGEST LOSER: COUPLES" ON TUESDAY, MAY 5 (8-10 P.M. ET)

UNIVERSAL CITY, CA � April 30, 2009 � The final four contestants, cheered on by five past season winners on the show, will face their toughest challenge yet -- running a full marathon (26.2 miles) -- on the penultimate episode of "The Biggest Loser: Couples" airing Tuesday, May 5 on NBC (8-10 p.m. ET).

First, the final four contestants � Tara Costa (New York, NY), Mike and Ron Morelli (South Lyon, MI) and Helen Phillips (Sterling Heights, MI) 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.

Back in California, the final four are off to try to complete the 26.2 mile course. Cheering them on along the way are some past season "Biggest Losers" -- grand prize winners Michelle Aguilar (season 6) and Ali Vincent (season 5), plus "at home" winners Jim Germanakos (season 4), Heba Salama (season 6) and Bernie Salazar (season 5). And as an added incentive, each player who finishes the marathon will get $10,000 to donate to the charity of his or her choice.

Later, it's the very last "last chance workouts" with the trainers before a final weigh in determines who the two definite finalists will be � and which two contestants fall below the dreaded yellow line. Then America will vote to select the third finalist to compete for the grand prize of $250,000. Viewers can vote by phone or online at www.nbc.com. The contestant America has chosen will be revealed in the live season finale on May 12 (8-11 p.m. ET).

"The Biggest Loser" is a production of Reveille LLC, 25/7 Productions and 3Ball Productions. Ben Silverman (NBC's "The Office," "Ugly Betty"), Dave Broome ("A Model Life with Petra Nemcova," "Tsunami Aid: A Concert of Hope"), JD Roth ("Age of Love," "Beauty and the Geek"), Todd A. Nelson ("Unan1mous," "Beauty and the Geek") and Mark Koops ("American Gladiators," "Shear Genius") serve as executive producers.