Compared to the books, I find the Harry Potter movies drawn-out and boring, but I rewatched this one during the pandemic and found that I enjoyed all three thirteen-year-olds as well as Hagrid, Sirius, Snape, Lupin, and—most of all—the fact that the filmmakers didn’t blithely destroy the single static timeline out of a misplaced sense that time travelers are meant to change the timeline willy-nilly.