NOTE: Old Man McGucket is the only one actually present at all times. All other speakers speak only on the TV, and are part of clips from previous episodes. When another character is talking or appears, assume that the focus has cut from McGucket to the screen, and when McGucket is talking, unless specified otherwise, assume that the focus is back on him.
Open with the screen spinning and then to Old Man McGucket.
That number's a-haunting my dreams! That number! 6-18!
(Cutting back and forth between scenes on the TV and him as he speaks) I got to figuring: the only thing that makes sense: it's a clue from a creature in another dimension, that we're all just drawings on a page!
Dipper and Mabel
(TV screen is cut in half, as the clips are from two different episodes) Everything is different now.
Cut between McGucket, who is laughing, and the TV, which shows various characters laughing.