Tough as Nails

CBS | 9:00 pm

Camp Pendleton Marine Corps Base in Southern California provides the backdrop as series creator and host Phil Keoghan introduces 12 new blue-collar competitors for Season 3 of this hit reality show. Marine veteran Kelly "Murph" Murphy, the winner of Season 1, also returns to kick off tonight's season premiere. Among the diverse contestants vying in a series of challenges to test their strength, endurance, life skills and mental toughness are a fire captain, a crop duster, a lineman and an ironworker, among others.