Actor Daniel Radcliffe, director David Yates, and producer David Heyman break down the intricate plot points of Half-Blood Prince in a new interview.

Dan and Heyman discuss how much Harry's knowledge and experience of the wizarding world has been furthered from the first to the sixth book:

"For me, the Harry Potter films have always been about a loss of innocence," says Daniel Radcliffe, the actor behind the title character, who can perhaps no longer be called the boy wizard. "When Harry came into this world, it was all just amazing and brilliant and kind of pure. But as the films have gone on, that's totally disintegrated, and he's realizing that the wizarding world has just as many, if not more, challenges than the world he grew up in before."

"In the last film, we were watching Harry at a difficult stage—tormented by dreams, questioning himself and beset by personal demons. Now he's a year older and that brings a different set of issues and responsibilities."