The Rebellion Begins! Lord Voldemort is back, but the Ministry of Magic tries to keep a lid on the truth - including appointing a new, power-hungry Defense Against the Dark Arts professor at Hogwarts. Ron and Hermione convince Harry to secretly train students for the wizarding war ahead. A terrifying showdown between good and evil awaits in this enthralling film version of the fifth novel in J.K. Rowling's Harry Potter series. Prepare for battle!