Dipper uses time traveler Blendin Blandin's time machine to undo ruining his attempt to impress Wendy at a fair, but accidentally changes history for the worse, especially for Mabel. In the end credits, Blendon time travels to three scenes from earlier Gravity Falls episodes, wherein he is actually included.
Did You Know?
First appearance of Waddles. See more
He was my soul mate!
You said that about a ball of yarn once!