Harry and his friends Ron and Hermione ( Rupert Grint and Emma Watson) return to a Hogwarts that boasts, as it does every school year, peculiar new faculty members (this school policy promises years of employment for British character actors). Harry is no longer someone you can mess with. We first met him as the poor adopted relative of a suburban family that mistreated him mercilessly this time, Harry is no longer the long-suffering victim but zaps an unpleasant dinner guest with a magical revenge that would be truly cruel if it were not, well, truly funny. As Harry returns for his third year at Hogwarts, grim wraiths named Dementors are stationed at every entrance to the school to ward off Sirius, but the Dementors are hardly reassuring, with their trick of sucking away the soul essence of their victims. The film centers on the escape of the sinister Sirius Black ( Gary Oldman) from Azkaban Prison Sirius was convicted in Voldemort's plot to murder Harry's parents, and now it's suspected he must finish the job by killing Harry.
