Body Challenge Discovery, 8pm This six-part reality series challenges participants to lose weight, get in shape and make an overall positive lifestyle change. The series tracks three men and three women as they follow an intense programme of diet and exercise with the help of their own personal trainers. The 55th Annual Emmy Awards Pearl, 9.30pm Why get one comedian to host this year's Emmy Awards when you can have nine? The hosts include Ellen DeGeneres, Brad Garrett, Garry Shandling, Martin Short and Wanda Sykes among others. Six Feet Under is leading the pack with 16 nominations, including one for best drama where it's up against 24 and The West Wing, second-highest with 15 nominations.