S15, E1: "The Biggest Loser" returns with 15 inspiring contestants - including the show's first celebrity player, Ruben Studdard, an uplifting "Second Chances" theme and powerful new roles for trainers Bob Harper, Jillian Michaels and Dolvett Quince. For the first time ever in the show's history, trainers sat in on casting sessions and helped select the new contestants, and also received a "trainer save," allowing each one to save one eliminated contestant from going home. Contestants eager for a second chance to reclaim their health and re-write their futures include "American Idol" winner Ruben Studdard, this season's heaviest contestant at 462 pounds, David Brown, who lost his first wife to an almost decade-long battle with cancer and is now fighting for his life so he can be there for his daughters, and Tanya Winfield, a single mom addicted to food who grew up with a teenage mom addicted to drugs, who is eager to break the cycle of addiction in her family. Also competing this season will be Olympic weight lifter Holley Mangold, hoping to get in the best shape possible for a second chance at gold in the 2016 Olympics, and Matt Hooper, who postponed his wedding to be on the show so he could give his fiancé the best physical version of himself.