Harry (Daniel Radcliffe), Ron (Rupert Grint) and Hermione (Emma Watson) return to Hogwarts for a third adventure-and-magic-filled year in this follow-up to the first two Potter blockbusters. Harry comes face-to-face with danger yet again, this time in the form of escaped convict Sirius Black (Gary Oldman). In a bid for help, Harry turns to sympathetic Professor Lupin (David Thewlis) -- but will it be enough?