Deeper. Bolder. Darker. As the eight Harry Potter films trace Harry's journey from innocent schoolboy to selfless hero, the series undergoes a transformation. Evolution - packed with exclusive content - takes you along for every exciting step of the 10-year filmmaking odyssey. Join the four directors and key members of the crew and cast, including Daniel Radcliffe, Rupert Grint and Emma Watson, as they explore how the creative vision for the films evolved to maintain the integrity and increasing intensity of J.K. Rowling's expansive literary series. From the ever-changing architecture of Hogwarts castle and growing landscape of the wizarding world, to the darkening palette of each successive film, to the young actors maturing along with their characters, it is a wondrous and spectacular adventure to experience.