Plot: Harry Potter (Radcliffe) is danger in his 3rd year at Hogwarts - this time from convict Sirius Black (Oldman), who has escaped from the wizard’s prison of Azkaban. Harry also has to be on the lookout for the Dementors, the creepy Azkaban prison guards looking for Sirius. Plus, will the new Defense of the Dark Arts teacher at Hogwarts , Professor Lupin (Thewlis), be able to last longer than any of his predecessors? Based on the novel by J. K. Rowling.