Episode Title:Phineas and Ferb's Quantum Boogaloo - Musical Cliptastic Countdown.Episode Description:Phineas and Ferb's Quantum Boogaloo: After encountering them in the future, an older version of Candace decides to steal Phineas and Ferb's time machine and go back in time to the day they built a rollercoaster so she can help the present Candace catch them in the act. But when her actions cause a chain reaction turning the future into a dystopian society led by Dr. Doofenshmirtz, the future Candace decides to enlist her present brothers to help restore the good future.
Musical Cliptastic Countdown: Major Monogram and Dr. Doofenshmirtz present a viewer-voted countdown of songs from Season 1, while Doofenshmirtz himself plots to take over the world with a song that is scientifically engineered to permanently become stuck in the mind.