A Chat with Filch in the Dungeons I found Mr. Filch, Hogwarts’ ever-grumpy caretaker, hunched over a broken car key fob in the dungeon storeroom. A tiny silver disc glinted in his hand—no, not a Galleon, but a CR1620 battery. “Useless thing,” he muttered, prying at the fob. “But if it fails, the Headmaster’s car won’t unloc