"Phineas and Ferb" are Phineas Flynn and his stepbrother, Ferb Fletcher who are determined to make every day of their summer vacation fun. They try building a full-scale roller coaster, becoming musicians, building a backyard beach, and traveling back in time to meet dinosaurs. Their family pet, Perry the Platypus, doubles as a secret agent and battles evil. Meanwhile, older sister Candace is tattling on them to Mom and Dad, though she can never seem to catch them in the act.
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Act Your Age 06x01
Set 10 years in the future, a teenaged Phineas must decide between two colleges while grappling with the discovery that Isabella has had a crush on him since they were kids.
Doof 101 / Father's Day 05x17
Doof invents an Inator to make him look like the pizza delivery boy; Candace gets hit by the ray and uses her new appearance as a boy to find out what makes boys tick.
Tales from the Resistance 05x16
Doofenshimirtz is in jail, and Candace is feeling restless. A new threat is beginning to appear in the Second Dimension, she must team up with Phineas and Ferb to resist it.
Night of the Living Pharmacists 05x15
Doofenshmirtz's latest ``inactor'' turns Danville citizens into contagious zombies; agent P. and the gang try to save the town and avoid becoming zombies themselves.
Lost in Danville / The Inator Method 05x14
A mysterious capsule falls into Phineas and Ferb's backyard; a model solar system.
Hide and Seek / Fly on the Wall (Disney XD) 05x13
Imperfect Storm 05x12
Phineas and Ferb make a wind amplification device. Doofenshmirtz makes plans for revenge on his childhood foe.
The Belly of the Beast 05x11
Phineas and Ferb make a mechanical version of a historical shark.
Operation Crumb Cake / Mandace 05x10
Isabella sends a letter to Phineas admitting her true feelings; Doof invents an ``-inator'' to disguise himself as the local pizza delivery boy.