For 'Harry Potter' fans, 'The Deathly Hallows Part II' was a satisfying-slash-draining end to one of the greatest stories ever told. Now they'll have a chance to relive that emotional roller coaster all over again with 'When Harry Left Hogwarts,' a documentary about the final two installments of the franchise. As Slashfilm points out, the feature will only be available on the four-disc Blu-ray edition of 'Deathly Hallows Part II,' available at Target on Nov. 11. The first trailer for the documentary, which you can watch ahead, features brief interviews with Daniel Radcliffe, Emma Watson, and Rupert Grint, discussing, among other things, the role these movies played in their lives and the uncertainty about their future. There are also several behind-the-scenes shots of the team filming the movie at Leavesden Studios in England.