Speculation surrounds HBO's Harry Potter series, including potential new storylines and cast members. Fans dream of Andrew Garfield playing Lupin, a significant character in the franchise.

During Harry Potter's sixth year at Hogwarts, he finds a book that once belonged to the mysterious Half-Blood Prince that earns him the respect of his new Potions professor Horace Slughorn.

British actor-comedian Nick Frost who is nearing a deal to play half-giant Rubeus Hagrid in the HBO series 'Harry Potter', ...