TERRY O'QUINN
Onscreen: former dad-stalker Pre-crash, Locke was too obsessed with his kidney-stealing father to commit to girlfriend Helen (Katey Sagal).
Offscreen: former muckraker O'Quinn, 53, met his wife of 26 years, Lori, when she gave him horseback-riding lessons. "I could ride for free if I cleaned stalls," he says. "So I cleaned 50 stalls a day and got closer to Lori."
Fun fact: He loves filming in Hawaii. "If this show stops going in five years, I'm staying."