Phineas and Ferb travel to the future to find a tool that hasn’t been invented yet, and run into future Candace. Seeing an opportunity to finally bust her brothers, she follows them back through time to catch them building their rollercoaster, and exposes their antics to her mom. In the process, she accidentally foils Agent P’s defeat of Dr. Doofenshmirtz, starting a chain reaction that turns the future into a dystopian society.

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This episode of Phineas and Ferb airs MONDAY, SEPTEMBER 21 (8:00 p.m.-8:30 p.m., ET/PT) on Disney XD.
Phineas and Ferb stars Vincent Martella as Phineas Flynn, Thomas Sangster as Ferb Fletcher, Ashley Tisdale as Candace Flynn, Mitchel Musso as Jeremy, Caroline Rhea as mom Linda Flynn-Fletcher, Richard O’Brien as dad Lawrence Fletcher, Dee Bradley Baker as Perry the Platypus, Alyson Stoner as Isabella, Jeff “Swampy” Marsh as Major Monogram and Dan Povenmire as the nefarious Dr. Doofenshmirtz. “Phineas and Ferb” is a production of Walt Disney Television Animation.
Guest starring is Jennifer Stone (“Wizards of Waverly Place”) as Amanda, Moises Arias (“Hannah Montana”) as Fred and Jennifer Grey (“Dirty Dancing”) as the Librarian.
Phineas and Ferb’s Quantum Boogaloo was written by Scott Peterson and directed by Zac Moncrief.
Phineas and Ferb carries a TV-G parental guideline.
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