Release Message:  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 (Kristin Schaal).

Description:  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. Upon finding a time machine, Dipper tries to go back in time to undo a mistake.