It is not surprising that the best, most expertly made movie of the 'Harry Potter' franchise is "The Prisoner of Azkaban." All credit must go to the best director to have ever helmed a Potter movie: Alfonso Cuarón. The director of "Children of Men," "Gravity" and "Y Tu Mama Tambien" used his visual, errrr, wizardry in the 2004 movie to make something unmistakably unique. This is when the Potter books got dark, grittier and went a completely different direction.