Harry Potter, Ron and Hermione return to Hogwarts School of Witchcraft and Wizardry for their third year of study, where they delve into the mystery surrounding an escaped prisoner who poses a dangerous threat to the young wizard. Adventure,Family,Fantasy This is one of my favourites of the franchise because I love Sirius Black and time travelling. Harry Potter's universe was still full of surprises at this point and the films never failed to impress. I also noticed a better soundtrack as well - not that it wasn't already pretty good in the previous ones, I just liked this one better. Oh, and RIP Richard Harris (this is the first one with Michael Gambon).