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 an endless ice luge to beat the heat while Doof brings oil to a waterpark; Candace and Doof see the same psychologist, who thinks their experiences may be connected.
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.
Stepbrothers keep busy during their summer vacation.
NHL superstar Luc Robitaille offers his assistance when Phineas and Ferb take an ice hockey game to the extreme; Phineas and Ferb plan their own New Year's Eve ball drop.
Phineas and Ferb build a huge biodome; Candace pays a visit to Jeremy's house.
The boys invent a pair of boots that make the wearer to be faster; the kids decide to create and race a giant hot air balloon.
Ferb puts together a clip show of the gang's favorite moments in celebration of Phineas' birthday.
The boys make a mechanical version of a historical shark; the boys take some cows to the moon.
Candace discovers that Phineas and Ferb have invented a computer that can answer anything; Candace takes Perry to the Charity Pet Wash with her.
The phone the boys invent for Candace sends her back to Easter Island; Dr. Doofenshmirtz's new invention picks Vanessa up from class.
Candace gives herself a bad haircut; Doofenshmirtz enters a family meatloaf recipe with a secret ingredient into a competition.
Candace spends the entire day in the backyard so that she can bust her brothers; Dr. Doofenshmirtz thinks Vanessa overhears him say he would rather have a son to do his evil bidding.
Candace injures her ankle and is told to stay in bed; Phineas and Ferb decide to build a truck stop diner on top of the RV.
Ferb's cousins visit from England and challenge him to a soccer match.
Perry wins a contest and becomes the spokesanimal for Totally Tools.
Candace is bitten by a bat; the kids encounter a strange boy and his father who are convinced their house is haunted.
Phineas and Ferb create their own language, Ferb Latin; The boys clone potatoes when all of them go missing in Danville.
Phineas and Ferb are cavemen and invent something useful; Dr. Doofenshmirtz tries to remodel his place; Phineas and Ferb must rescue Princess Isabella.
Phineas and Ferb think up a new game; volleyball with jet-packs.
Candace tries to recreate a gift.
Doof claims to have had an epiphany; Ohio Flynn and Rhode Island Fletcher set off to South America.
Paul the Delivery Man on a journey.
When Mom asks the kids to be quiet, Phineas and Ferb create ninja outfits.
The boys search for doonkleberries for mom's famous doonkleberry pie; Phineas and Ferb create a run-through-the-sprinkler experience.
Meap returns to save Phineas and Ferb from his nemesis Mitch; Dr. Doofenshmirtz decides to revisit his former nemesis, Peter the Panda.
Candace asks the boys to invent a device; the boys invent a brain booster.
The boys create a Perry that can go anywhere and do everything with them; Candace's plans to watch over the boys backfire.
Candace tries to bust the boys; the boys help their father unearth a piece of history.
Doof transforms into a platypus to beat Perry, but finds it's harder than he thought.
Phineas and Ferb go on safari while Perry protects Danville from a new evil.
Agent P is nowhere in sight and Dr. Doofenshmirtz and Major Monogram square off against evil Carl.
The boys discover a strange planet is hurtling directly towards Danville; one of Dr. Doofenshmirtz's "inators" zaps both him and Agent P into the middle of nowhere.
Candace is in charge of the boys when the city loses electricity.
The boys work on turning the city of Danville into a giant thank you card for Santa Claus.