The boys decide to ramp up their local summer block party with supersized attractions; the kids work to save Mom after she is hit by Doof's inator.
The kids build a giant submarine sandwich submarine while Doof steals food; Candace tries to bust the boys while taking her driving test; Doof causes chaos in traffic.
The boys build a zoetrope that goes on an adventure of its own; the kids build a bookcase that gets attacked by an army of Doof-plants.
The boys bring Perry to the vet for a checkup and build a pet wash while they wait; Carl tries to help Perry stop Doof while working three other part-time jobs.
The Flynn-Fletchers take a cruise; Doof steals shrunken goods; Isabella struggles to lead the Fireside Girls on her own, while Doof renews his evil business license.
Candace puts Mom in a Candace costume in hopes that she'll finally see the boys' invention; Stacy takes on an agent role with OWCA to rescue Perry from some evil scientists.
Doof becomes a mothman; the boys make a movie set.
Meap enlists Candace and the kids to help bust his nemesis, Mitch, before he can steal a long-lost treasure hidden somewhere on Earth.
The kids have a sleepover; Doof's cousin traps Perry.
Buford's Candace suit comes to life and tries to take over the real Candace's life; Candace ignores her brothers for a day in order to help her Mom with a bust of her own.
Vanessa and Doof travel to Drusselstein while the boys dig for Mom's lost wedding ring; the kids build a bird mansion for a rare macaw while Doof deals with giant praying mantises.
Doof's dream-project-inator misfires and projects people's dreams for all to see; Doof becomes the center of his own solar system while Irving tries to impress Phineas and Ferb.
OWCA and LOVEMUFFIN face off in a soccer match while the boys help Buford with his aim; people around Danville turn evil after being hit by Doof's latest inator.
While Buford is sick, Baljeet makes him watch an episode of his favorite show, "Space Adventure!"; Isabella works with Doof to bake a giant pastry to impress foreign emissaries.
Doof gathers energy from people exercising while the kids pilot a boat that surfs concrete; Candace and Jeremy make a Perry documentary as the kids play an extreme game of croquet.
Vanessa and Monty bring their warring fathers, Doof and Monogram, to a "meet the parents" dinner; Buford goes on a whimsical adventure with a bread bowl hot tub.
Monogram and Carl inspect Agent P's many lair entrances while Candace tries to speak to the Mysterious Force; the kids go on a dungeon crawl while Doof tries a reality dating show.
Stepbrothers keep busy during their summer vacation.
Doof starts the vendpocalypse; Doof saves Norm.
The boys build the world's greatest roller coaster; Candace is surprised during a trip to Mount Rushmore.
The boys enter the family automobile in a car race; then, a tropical beach paradise in the backyard goes awry.
Phineas enters a thumb-wrestling contest with Buford; Candace tries out for the lead in her favorite play.
Candace joins a jousting tournament at the Renaissance festival; the boys build robot clones of themselves to complete more projects.
Candace models clothing created by Phineas and Ferb; the boys cheer up Isabella after her tonsils are taken out.
Phineas and Ferb herd stampeding cattle back to a carnival; the boys create a winter wonderland in the middle of summer.
Phineas and Ferb create a circus for the neighborhood; the boys market a wooden toy version of Perry the platypus.
The boys capture Candace, who is wrapped up like a mummy; Phineas and the Ferb-Tones become a one-hit wonder.
The boys create a monster truck for Candace to practice her driving skills; Grandpa tells the boys about Badbeard the pirate while on a camping trip.
The boys undermine Candace's birthday gift for their mother; a shrinking sub excursion into Isabella's dog ends up in Candace.
Dr. Doofenshmirtz makes Perry the Platypus jealous with his new nemesis; Phineas and Ferb travel back in time.
When Dad forgets his wedding anniversary, the children must find their parents' favorite band; Dr. Doofenshmirtz plans a birthday party for his daughter.
Phineas and Ferb get shipped off to reform school; investigative talk show host Morty Williams prepares an eye-opening report on the school.
Phineas and Ferb re-create a chariot race; a reality show records the brothers building a white-water rafting ride.
The boys build a roller-derby rink so that their grandmother can compete against an old rival; the boys take the day off, to Candace's dismay.
Phineas and Ferb unearth a real caveman who falls for Candace; the boys help Buford retrieve his pet goldfish.
Perry tries to destroy traffic cam footage sought by Candace; Phineas and Ferb build the world's largest bowling ball and pins.
The boys create "The F Games" to help Buford and Isabella settle a disagreement; Candace has an encounter with Jeremy's little sister Suzy.
Candace asks Stacey to bust the boys and their new golf course; a teleporter accident switches Perry and Candace's brains.
Phineas and Ferb stumble upon Perry's secret lair; the boys help their grandfather jump a gorge on his motorcycle.
The boys get together with the neighborhood kids to help scare the hiccups out of Isabella.
One of Ferb's ancestors helps a scientist create a monster; Django gets help from the boys creating an art masterpiece.
Phineas and Ferb create a cartoon where they are the heroes and Candace is the villain; the boys create a Rainbow-inator to help Isabella see her first rainbow.
Phineas and Ferb create a rocket ship to explore a star that was named after them.
The boys help Baljeet put together his summer school science fair project.