4. Brandon Routh
Brandon Routh played a bad boy pretending to be a good guy on four episodes of Undressed. This was about a year after he was an extra in Christina Aguilera's "What a Girl Wants" music video.
Routh later played Seth Anderson on One Life to Live before hitting it big as Superman in 2006's Superman Returns. These days, Routh is filming a new CBS pilot and makes occasional appearances on Chuck.