About: Northwest Mansion Mystery

"Northwest Mansion Mystery", also listed as "Northwest Mansion Noir", is the tenth episode of the second season of the American animated television series Gravity Falls, created by Alex Hirsch. The episode was written by Jeff Rowe, Hirsch, and Mark Rizzo, and directed by Matt Braly. In the episode, Pacifica Northwest, arch-rival of Dipper Pines, asks Dipper to handle a paranormal ghost at the Northwest Manor at their party, which eventually turns into Pacifica making a choice on whether to continue her family's stained reputation or on starting a new era for the Northwest family. The episode ends on a cliffhanger, with McGucket telling a warning to Dipper that a "big event" is happening soon.