ITV's 'Half-Blood Prince: Behind the Magic'

*CAUTION: SPOILERS*
Ben Shephard visits the set of "Harry Potter and the Half-Blood Prince" for ITV's special "Behind the Magic." Mr Shephard interviews the cast, chats to the crew and is lucky enough to play an actual role in the film. This excellent video contains lots of new footage of the actors at work on set, and also a couple of new clips from the film.