We have long loved Emma Thompson, an Oscar winner we've never quite gotten enough of. But when she first appeared as no nonsense Nanny McPhee, armed with a snaggletooth, warts, body padding and a potato-like nose, we wondered what she was up to. Did the glowing star of "Sense and Sensibility" really want to spend her days playing a circus freak version of Mary Poppins? Apparently so -- "Nanny McPhee Returns," the sequel to "Nanny McPhee," 2005's hit family movie -- arrives in theaters this week.