Premise: Phineas Flynn and his stepbrother, Ferb Fletcher, 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.
S03, E28 (First Aired: May. 4, 2012)
Candace asks the boys to invent a device; the boys invent a brain booster.
S03, E32 (First Aired: Jun. 22, 2012)
Candace tries to bust the boys; the boys help their father unearth a piece of history.