"Harry Potter and the Half-Blood Prince" is the sixth installment in the J. K. Rowling novel-based film series. Set during his 6th year at Hogwarts School of Witchcraft and Wizardry, Harry Potter (Daniel Radcliffe) discovers an old book labeled "the property of the Half-Blood Prince" and subsequently begins to learn more about Lord Voldemort's dark past. The young wizard must also deal with emerging romantic relationships and emotional confusion typical of his age as he readies for the final battle. "Potter" stars Emma Watson and Rupert Grint also reprise their roles in the 2009 installment.