As the show kicks off its fourth season tonight, check out the ABC hit's sexy stars
Fox (who plays Jack Shephard), 41, is known to doff his duds between takes. "When I was a kid there wasn't a huge delineation in our family between having clothes on or not having clothes on," he has said. "The reason I have so much fun doing it now is [because] people are so shocked by it."
Credit: Everett Collection