Thirteen past contestants including Marty Wolf, Poppi Kramer and season three winner Erik Chopin, return to the scale one last time in this hour-long special. Fans are in for a treat when it is revealed who kept the weight off and who is still struggling, as well as what has been happening in their personal lives. After watching all the contestants go through an emotional and physical transformation over the last three seasons, trainers Bob Harper and Kim Lyons will be able to see if everyone's hard work has paid off.