Gravity Falls Season 1 Episode 8
Overview
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.
Director: Aaron Springer
Guest Star: Alex Hirsch, Chris Parnell, Gregg Turkington, Jackie Buscarino, Kari Wahlgren, Keith Ferguson, Kevin Michael Richardson, Tara Strong, Thurop Van Orman