In Los Angeles, a number of decaying old movie palaces are being restored, thanks in large part to a private investor with a passion for old films. And the redevelopment has another big city 3,000 miles away paying attention. In Philadelphia, where downtown is bustling and decrepit old buildings are being torn down at a record rate to make way for new structures, time is running out on the one remaining classic movie palace in town. But will the city consider a one-screen throwback worth saving?