4. Harry Potter and the Goblet of Fire: The murder of kind and decent Cedric Diggory (Robert Pattinson). It's the darkest moment up to that point in the Potter saga, as Harry experiences the death of someone close to him for the first time since he lost his parents. Meanwhile, he's forced to confront just how deadly his nemesis Voldemort (Ralph Fiennes) is, and how likely it is that their clash may claim the lives of more innocents.