Hermione Granger is crucial to Harry and Ron in their successful mission to solve the mystery of the Chamber of Secrets. Hermione is revived after Harry kills the basilisk, but she is distraught to learn that all end-of-year exams have been cancelled as a school treat. Hermione buys a cat named Crookshanks, who takes to chasing Ron's pet rat, Scabbers. Before the start of term, Professor McGonagall secretly gives Hermione a Time-Turner, a device which enables her to go back in time and handle her heavy class schedule, though this is not revealed until the penultimate chapter. Much tension comes into play
Harry Potter and the Deathly Hallows – Part 2 him once and for all. The film stars Daniel Radcliffe as Harry Potter, alongside Rupert Grint and Emma Watson as Harry's best friends, Ron Weasley and Hermione Granger. Principal photography began on 19 February 2009, and was completed on 12 June 2010, with reshoots taking place in December 2010, more than ten years after filming started on the first instalment of the series. "Part 2" was released in 2D, 3-D and IMAX cinemas worldwide from 13–15 July 2011, and is the only "Harry Potter" film to be released in 3-D. The film became a commercial success and was critically acclaimed,