"Harry Potter and the Deathly Hallows, Part I" is a brooding, slower-paced film than its predecessors, the result of being just one half of the final story (the last book in the series was split into two movies, released in theaters eight months apart). Because the penultimate film is all buildup before the final showdown between the teen wizard and the evil Voldemort (which does not occur until "The Deathly Hallows, Part II"), "Part I" is a road-trip movie, a heist film, a lot of exposition, and more weight on its three young leads, who up until now were sufficiently supported by a revolving door of British thesps throughout the series. Now that all the action takes place outside Hogwarts--no more Potions classes, Gryffindor scarves, or Quidditch matches--Daniel Radcliffe (Harry), Emma Watson (Hermione), and Rupert Grint (Ron) shoulder the film almost entirely on their own. After a near-fatal ambush by Voldemort's Death Eaters, the three embark on a quest to find and destroy the remaining five horcruxes (objects that store pieces of Voldemort's soul). Fortunately, as the story gets more grave--and parents should be warned, there are some scenes too frightening or adult for young children--so does the intensity. David Yates, who directed the Harry Potter films "Order of the Phoenix" and "The Half-Blood Prince", drags the second half a little, but right along with some of the slower moments are some touching surprises (Harry leading Hermione in a dance, the return of Dobby in a totally non-annoying way). "Deathly Hallows, Part I" will be the most confusing for those not familiar with the Potter lore, particularly in the shorthand way characters and terminology weave in and out. For the rest of us, though, watching these characters over the last decade and saying farewell to a few faces makes it all bittersweet that the end is near (indeed, an early scene in which Hermione casts a spell that makes her Muggle parents forget her existence, in case she doesn't return, is particularly emotional). Despite its challenges, "Deathly Hallows, Part I" succeeds in what it's most meant to do: whet your appetite for the grand conclusion to the Harry Potter series. --"Ellen A. Kim"