Harry Potter and the Prisoner of Azkaban(2004)
Fed up with his life at the Dursleys, Harry Potter is taken away to live at the Leaky Cauldron. He learns there that Sirius Black, a convicted supporter of Voldemort, has escaped from Azkaban Prison and is plotting to kill him. Harry goes back for his third year at Hogwart's and must prepare to fight him to the death.
The third in the series.