It is the film which served as the stepping stone between Harry Potter ’s early years as an innocent young wizard and his growing maturity as he deals with the darker forces at play in his magical world . The third installment in the franchise, Harry Potter and the Prisoner of Azkaban also marks Daniel Radcliffe ’s character’s third year at Hogwarts. The teenage wizard learns that the 'evil' Sirius Black ( Gary Oldman ) has escaped from Azkaban and is apparently plotting to kill him. Joining