Phineas and Ferb construct a rollercoaster from their backyard out to the whole city for themselves and the neighborhood kids. Doofenshmirtz's evil plan to halt the Earth's rotation.
Phineas and Ferb build a huge paradise of a beach in their backyard on the hottest day of the year.
Phineas and Ferb build a tree house and remodel Candace's old one. Guest voice: Vicki Lewis as Lulu and Gwendoline Yeo as Fifi. Candace realizes without busting her brothers, her life is pretty empty.
With the help of Phineas and Ferb, two old roller derby rivals hold a grudge match. Doofenshmirtz has his own grudge against people with beards and mustaches, which includes U. Doofenshmirtz is tired of being the ugliest person around, so he invents the Uglyinator.
Doofenshmirtz from taking over the Tri-State Area with a giant building-shaped robot. Phineas and Ferb enter the Swamp Oil 500 after upgrading mom's car.
Doofenshmirtz tries to deflate everything in the Tri-State Area from his blimp.
Meanwhile, with the annoyance of the mid-summer festival, Dr.
Doofenshmirtz creates a machine which sprays the smell of dirty diapers all over the tri-state area.
Doofenshmirtz creates a device to make people's voices higher so his own voice will seem lower but instead, it gets even higher. Phineas and Ferb help Candace learn how to parallel park by building a monster truck track in the backyard. Doofenshmirtz is marketing his new line of monster trucks to investors, and proceeds to try and get rid of the competition.
The boys make the biggest ice-cream maker for Isabella after her tonsils are taken out. Guest voice: Billy Ray Cyrus as Buck Buckerson Isabella's dog Pinky eats her sash, so the boys build a mini-submarine to retrieve it, except they end up someplace else. Doofenshmirtz's latest scheme specifically threatens Phineas and Ferb.
Guest voice: April Winchell as Blanca Dishon and Kevin Michael Richardson as P. Otter The Flynn-Fletcher family goes to London, where Candace and Stacy dress up as Sherlock Holmes to bust Phineas and Ferb. Doofenshmirtz plans to move Big Ben to the tri-state area, where Agent Double O-O helps Perry thwart his plan.