Some movie-loving wizards must have cast a magic spell on Harry Potter and the Prisoner of Azkaban,  because it's another grand slam for the Harry Potter franchise.  Demonstrating remarkable versatility after the arthouse success of Y Tu Mamá También,  director Alfonso Cuarón proves a perfect choice to guide Harry,  Hermione, and Ron into treacherous puberty as the now 13-year-old  students at Hogwarts School of Witchcraft and Wizardry face a new and  daunting challenge: S....