Co-written by Henry Galley. In his acclaimed cartoon series Gravity Falls, Alex Hirsch created and voiced one of the most effective and memorable villains in western animation: Bill Cipher. The terrifying triangle cast a spell over viewers for years to come, and his legacy is the show's legacy. This is how that incredible villain met his well-deserved ending at the hands of the Pine Family. This is Bill Cipher's One Fatal Mistake. #billcipher #gravityfalls #alexhirsch