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 Goblet of Fire and Harry learns that Black was framed and is actually Harry's godfather. He also learned that it was his father's old school friend Peter Pettigrew who actually betrayed his parents. The book opens with Harry seeing Frank Bryce being killed by Lord Voldemort in a vision, and is awoken by his scar hurting. The Weasleys then take Harry and Hermione Granger to the Quidditch World Cup, using a Portkey, to watch Ireland versus Bulgaria, with Ireland emerging victorious. There, Harry meets Cedric Diggory, who is attending the match with his father. After the match, Voldemort's followers attack the site, destroying