Hermione Granger completing Snape's homework assignment from the class, while Crookshanks proves vital in exposing Scabbers as Peter Pettigrew, a friend of James and Lily Potter who revealed their whereabouts to Lord Voldemort the night of their murders, and was able to wrongly implicate Sirius Black (revealed to be Harry's godfather) in the Potters' deaths. The Time-Turner enables Hermione and Harry to rescue Sirius and the hippogriff Buckbeak. Hermione is horrified by the cruelty that house-elves suffer, and establishes S.P.E.W., the Society for the Promotion of Elfish Welfare, as an effort to gain basic rights for them. She is Bulgarian Quidditch prodigy
Harry Potter and the Prisoner of Azkaban (film) intending to kill him. The film stars Daniel Radcliffe as Harry Potter, alongside Rupert Grint and Emma Watson as Harry's best friends Ron Weasley and Hermione Granger. It also features well-known actors in supporting roles, including Gary Oldman as Sirius Black, David Thewlis as Remus Lupin, Michael Gambon (in his debut in the role of Albus Dumbledore), Emma Thompson as Sybill Trelawney and Timothy Spall as Peter Pettigrew. It is the sequel to "Harry Potter and the Chamber of Secrets" and is followed by "Harry Potter and the Goblet of Fire". The film was released on 31 May 2004 in