Irrational Treasure

Summary

When Dipper and Mabel discover evidence that the reported town founder is a hoax, they set out to expose the historical cover-up and prove that Mabel's silliness is not a bad thing.

Guest stars

• Jackie Buscarino as Pacifica Northwest (voice)
• Gregg Turkington as Toby Determined (voice)
• Thurop Van Orman as Gideon Gleeful (voice)
• Chris Parnell as Additional Voices (voice)
• Tara Strong as Sue / Additional Voices (voice)
• Keith Ferguson as Deputy Durland / Additional Voices (voice)
• Kevin Michael Richardson as Sheriff Blubs / Additional Voices (voice)
• Kari Wahlgren as Priscilla Northwest / Additional Voices (voice)