Sam Worthington breaks out as a big-screen action star in “Terminator Salvation.” But to him, he was like Dorothy in “The Wizard of Oz.” “That was always stuck in my head,” Worthington says. “Here's this person waking up in another world and trying to find himself as they go on this yellow brick road. They find the heart, the brain, the sensitivity, from the Tin Man and all these characters you meet, and they get to Skynet, which is Oz, to ask the question: Why am I not ... dead?” The 32-year
