The first two Harry Potter movies, both directed by Christopher Columbus, were massive hits. After those two relatively light-hearted movies, director Alfonso Cuaron came on-board and took the franchise in a darker direction with the third film- Harry Potter and the Prisoner of Azkaban. Harry Potter and the Prisoner of Azkaban definitely raises a few questions. Like why was Harry Potter intentionally doing magic outside of Hogwarts? When did the entire layout of Hogwarts and its grounds change so dramatically? How are a bunch of deadly Dementors better than the threat of a single wizard maybe entering the school? Did Fred and George not notice a man named Peter sleeping in their brother’s bed every night on the Marauder’s Map? What exactly were Wormtail and Sirius’s plans here? (thetvdb.com)