Dipper, Soos and Wendy go inside Mabel's bubble to save her and discover an odd world inside of it. Meanwhile, Bill and his friends try to initiate the second phase of their master plan.
Guest stars: Jon Stewart as Judge Kitty Kitty Meow Meow Face-Schwartstein, John Roberts as Xyler, Greg Cipes as Craz, Danielle Fishel as Pyronica, Patrick McHale as Hectorgon, Eric Bauza as Ernesto, Alfred Molina as the Multi-Bear