The computer HAL from Stanley Kubrick's 1968 sci-fi epic "2001: A Space Odyssey" is the "star" of this documentary, which asks: "how close are we to creating a real HAL?" The hour surveys the state of such artificial-intelligence components as vision, speech, emotion, robotics and "intelligence." "2001" author Arthur C. Clarke, for one, thinks it's only a matter of time. Then he turns the discussion on its ear. "We are machines," he says. "Carbon-based machines."