Phineas and Ferb construct a roller coaster in the backyard, and Doofenshmirtz tries to reverse the Earth's gravitational pull with tin foil. The boys remodel Mount Rushmore for Candace's 15th birthday, while Agent P stops Dr. Doofenshmirtz from making a tunnel to China.
The boys enter the family automobile in a car race. A tropical beach paradise in the backyard goes awry.
The boys go riding and decide they'd like to be cowboys. Dad gives the boys a snow cone machine and they turn summer into winter in the garden.
The boys have fun learning about Egyptian mummies and decide they'd like their own. In a bid to become the latest singing sensation, the boys enter a competition.
Phineas accidentally spills ice cream on Buford. Candace gets a movie part, but is horrified to discover that Phineas and Ferb are the directors.
While visiting their Grandparents at their mountain cabin, Phineas and Ferb organize a full day of summer camp activities. The boys remodel them and their sister's tree houses while Perry tries to solve the mystery of the missing pigeons.
Phineas and Ferb find a time machine at a museum and travel back to the Jurassic Age. Meanwhile, Perry is sad when Doofenshmirtz replaces him with a new nemesis, Peter the Panda, so he confides in a relationship talk-show host.
Phineas and Ferb make their own circus when the real circus performance is canceled. Phineas and Ferb invent a new Perry the Platypus toy.
When Isabella falls prey to hiccups, Phineas and Ferb gather the kids together to help scare them out of her, using a remote controlled haunted house. Meanwhile, Doofenshmirtz sets out to destroy his mentor's hideout, so that no one could discover his secrets, but not if Perry has something to say about it!
When the family is having its annual holiday with Grandpa in England, the boys hear the story of the Black Knight and decide to hold a medieval tournament. The boys build robots called Phinedroids and Ferbots, but they soon get out of control.
Phineas and Ferb are on a mission to make their mom's birthday the best ever. The boys try to shrink themselves so they can retrieve Isabella's sash after it was eaten by her dog, but they instead get eaten by Candace.
There's a fashion show at the mall, so the boys become fashion designers. Isabella has her tonsils taken out and is allowed to eat lots of ice cream.
Phineas and Ferb create a monster truck for Candace to practice her driving skills. While camping with the boys, Grandpa tells them about Badbeard the Pirate.
The boys locate their parents' favorite band, Love Handel, to perform a reunion concert in the backyard to make up Dad forgetting his wedding anniversary. Meanwhile, Doofenshmirtz plans a surprise birthday party for his daughter, Vanessa.
Phineas and Ferb stumble upon Perry's secret lair. Candace and Stacey win a day with a girl band, but it turns into a disaster. The boys discover that their Grandpa was a daredevil motorcyclist, so they try to get him to recreate his famous stunt.
Candace has finally busted her brothers, and they are being sent away to a reformatory school to stamp out their imagination! But just how long can Candace enjoy her summer without her usual routine, her family? And speaking of usual routine, where is Perry?
Phineas and Ferb recreate an ancient Greek chariot race. Candace enlists a reality show to help her bust Phineas and Ferb.
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.
Candace asks Stacey to bust the boys and their new golf course. A teleporter accidentally switches Perry and Candace's brains.
Candace borrows a DVD from a traffic camera to prove to her mother what the boys have been doing. Phineas and Ferb decide to break a record by making the biggest ever bowling ball.
Phineas and Ferb help their friend Django to impress his artist father Beppo by painting the Unpainted Desert. Meanwhile, Dr. Doofenshmirtz tries to impress his old evil science teacher, Dr. Gevaarlijk
The boys help Baljeet with his science project, A Portal to Mars. Candace tries Baljeet's Portal to Mars and finds herself queen of the red planet.
The boys build a rocket ship to get a good look at a star named for them, and Candace accidentally takes a ride with them just as she is trying to find the courage to ask Jeremy to a dance, while Isabella tries her best to do the same with Phineas. Meanwhile, Perry must stop Dr. Doofenshmirtz, who, not only is conveniently in space too, but has created a massive spacestation in an attempt to get revenge on "Huge-Hands-Hans".
Isabella challenges Buford to a sports contest. Candace reluctantly agrees to go to the park with Jeremy and Suzy.
The boys decide to build a studio to make their own cartoons, with Candace as the villain. Doofenshmirtz's brother has been elected mayor, so he builds his own country to rule.
After taunting the boys for going to search for the "Lake Nose Monster", Candace begins freaking out on her lifeguard job, seeing the monster at every turn. Meanwhile, Dr. Doofenshmirtz tries to remove all the zinc from the lake, though even he's not sure why.
Phineas and Ferb create an animal translator in order to understand Perry; The boys put on a concert to raise awareness that the plastic thing at the end of shoelaces is called an aglet.
Candace uses a growth elixir created by Phineas and Ferb in order to become taller for a modelling career; the boys build their new pet goldfish a backyard aquarium.
The boys are inspired by Candace's dessert club to make the biggest ever jelly, but it all goes horribly wrong when the jelly turns evil; Candace emulates Sherlock Holmes to find out what the boys have planned for the London Eye.
Candace attempts to locate where Phineas and Ferb's inventions go after they disappear; the boys open a restaurant called Chez Platypus, which becomes the trendiest place in town.
The boys find an egg and think Perry has laid it, so they build a platypus incubator, but Candace decides to look after the egg. Phineas and Ferb find a way to become part of a video game and drag Candace in too.
When an alien spacecraft crashes in Phineas and Ferb's backyard, they go about repairing his ship. Later, the boys and Isabella are captured by Mitch and it's up to Candace and Meap to rescue them.
A rivalry develops when the neighbor's visiting relatives meet, who are very similar to Phineas and Ferb; the boys are on a mission to build a plane bigger than Howard Hughes' Spruce Goose.
Candace finds out that Jeremy will star in a television commercial, and begins worrying that he will forget about her; Phineas and Ferb help Isabella and the Fireside Girls by building an automatic car wash to help with fundraising to save the starnose mole.
Perry has been relocated to help track a new villain called the Regurgitator, but Candace thinks his disappearance is her fault; the Flynn family takes a trip on a sloop and gets shipwrecked.
Major Monogram and Dr. Doofenshmirtz host this special episode counting down the top 10 most popular music videos from the show's first season as voted by the fans and viewers, but not without the evil doctor attempting to pull off another scheme to gain power. Fortunately, Perry the Platypus is there to save the day.
Phineas and Ferb travel to the future to find a tool that hasn't been invented yet, and run into future Candace. Seeing an opportunity to finally bust her brothers, she follows them back through time to catch them building their rollercoaster, and exposes their antics to her mom. In the process, she accidentally foils Agent P's defeat of Dr. Doofenshmirtz, starting a chain reaction that turns the future into a dystopian society.
The boys use their shrinking machine on themselves so they can fit anywhere; Baljeet asks Phineas and Ferb to help him impress a childhood girlfriend.
Phineas and Ferb form a band with Baljeet at his summer rock camp; Vanessa tries to get a capsule for her father, Dr Doofenshmirtz, to prove she's responsible enough to get her own car.
Candace adopts a stray rabbit, then the boys discover it's a spy; Candace and Stacey are going to a spa for the day, so the boys decide to build their own spa.
The boys and their friends float around town in a giant bubble; Isabella and the Fireside Girls try to get sap from a maracanut tree located inside The Old Abandoned Amusement Park.
The boys try to cheer Candace up after Jeremy cancels their date; the only way Candace can get to see her favorite band in concert is to join the Fireside Girls.
Baljeet saves Buford's life. Buford decides to stop bullying him, but Baljeet can't stand it; Phineas and Ferb help Candace trace her treasured doll, which was accidentally sold in a garage sale.
The boys reconstuct one of Doofenshmirtz's inventions to discover what it does after it lands in their front yard; Phineas and Ferb discover the lost city of Atlantis, Candace enters a sand castle building contest, and Dr. Doofenshmirtz tries to use a growth formula to make plants evil.
Phineas and Ferb create a Go Getter that can transport any item to their backyard, then discover it can transport them too; Candace wants to appear on a live TV dance show, and talks Jeremy into dancing with her.
Candace is taking part in a series of father and daughter competitions, with the help of Doof's robot; Candace babysits Jeremy's little sister Susy, who teaches her how to manipulate siblings.
Phineas and Ferb try to decorate the Tri-State Area as a thank you for Santa Claus, but when Dr. Doofenshmirtz tries to spread naughtiness across the city with his "Naughty-inator," the boys must help restore holiday cheer to Danville. Meanwhile, Candace tries to find out the contents of Jeremy's wish list.
When Phineas and Ferb create an anti-gravity device, Major Monogram sends Carl to investigate; the boys encourage the neighborhood kids to build their own floats for the yearly Tri-State Area Unification Day parade.
Phineas and Ferb create an orb that allows its user to pass through objects to help find Linda's guitar pick; when Aunt Tiana and Uncle Bob’s wedding is moved to the Flynn-Fletcher's backyard, Candace hopes that her brothers do not upstage her role as maid of honor.
After watching a sci-fi movie marathon, Candace becomes convinced that Ferb is an alien; the boys trick out the kiddie rides at a store, and Dr. Doofenshmirtz tries to burn his name into the atmosphere.
When Phineas and Ferb spin the house in order to paint it more quickly, Candace, inside the house, gets dizzy and collapses. She wakes up in the magical land of Odd and heads down the yellow sidewalk to Bustopolis to meet the Wizard.
Khaka Peü Peü arrives in Danville to challenge Phineas and Ferb after the boys are mistaken as a superhero (while wearing an indestructible suit they designed to safely conquer their newly built extreme skate-track) known as The Beak. With the super villain wreaking havoc, it's up to Phineas and Ferb to thwart him while Dr. Doofenshmirtz tells the people of the Tri-State area that he is in charge, in hopes that they will actually just go along with it. Meanwhile, his brother Roger is worried that everyone will blame him for the recent super villain catastrophe so he decides to make Doofenshmirtz Mayor.
Irving convinces Baljeet and Buford to pose as Phineas and Ferb so he can prove to his brother that he isn't lying; Candace, Stacy, and Jenny team up to try and bust Phineas and Ferb together.
Phineas and Ferb find a chameleon and call it Steve. Jeremy accidentally operates the Gigantinator, making Steve dinosaur sized and terrifying the locals. The boys build mechanical bulls and want to have a robot rodeo.
Phineas and Ferb build an all terrain vehicle while Candace is at a leadership retreat; The boys attempt to make Danville famous by building the world's tallest building.
Candace wins a competition and becomes the Mayor of Danville for the day; Phineas and Ferb build the ultimate lemonade stand, and start to sell franchises.
Phineas and Ferb build a life-sized maze full of fun obstacles in the backyard; Linda is invited to perform at a Lindana reunion, and the boys turn their dad into a rock star for the occasion.
Phineas and Ferb head to the Tri-State area’s annual sci-fi/comic book convention to meet their hero, special effects guru Clive Addison. Their plan gets sidetracked when they’re swept into a duel between fantasy fans and sci-fi geeks. Meanwhile, Candace tries to keep secret that she’s a fan of Ducky Mo-Mo, another convention staple. Across the convention hall, Dr. Doofenshmirtz has taken television executive Jeff McGarland hostage so he can pitch him a show he’s developed, Doof ‘N’ Puss.
The Flynn-Fletcher Family go on a vacation to Hawaii. While they are there, Phineas and Ferb make living sea creatures, Candace finds a lava necklace of bad luck, and Doofenshmirtz creates a De-Evolution-inator.
Candace stands in front of a ray, gets zapped and it splits her into two personalities; The boys are home with colds so they decide to make it the best sick day ever.
Candace swaps places with a princess who looks like her, but can't enjoy her new lifestyle because of her brothers' antics; Candace invites some friends over while her parents are away, and it gets out of hand as it slowly turns into a party.
Phineas and Ferb and their friends travel around the world. However, for once, not everybody believes they can achieve what they set out to do. Also, Candace and Jeremy's relationship will be further explored.
A musical in which Phineas and Ferb revisit the day they built a gigantic roller coaster in their backyard. Doofenshmirtz tries to pull the East Coast to the west using tinfoil and a huge magnet.
Candace uses boots that Phineas and Ferb invent to be in two places at once. A retiring train conductor inspires Candace to become determinedly lackadaisical.
Isabella is upset the rain has ruined her chance of getting a Fireside Girl patch, so the boys create a huge biodome in the yard to help her; Candace's obsession with Jeremy is harming her friendship with Stacy, so she plans a day with her. However, Doof zaps her and Jeremy with the Combine-inator, and they can't go anywhere apart.
When the boys make a model shark for Harbors Day, Candace employs Captain Squint to chase and capture it. The boys are inspired by the rhyme `The Cat and the Fiddle', and decide to take a cow to the Moon. They want to see if low gravity produces the best ice cream ever.
It's Phineas' birthday and for the special occasion, Ferb puts together a clip show of the gang's favorite moments. Meanwhile, Agent P has to stop Dr. Doofenshmirtz from using his 'non-inator' to pre-empt his brother's biography from appearing on television.
The boys invent a computer to answer any question, and Candace wants to ask it how to reveal the boys' inventions to their mom. Candace drags Perry off to a charity pet wash, leaving a platypus from the zoo to battle Doof.
Candace's mom threatens not to buy her another phone if she loses the current one, and when the inevitable happens, she turns to Phineas and Ferb for help─with disastrous consequences. Inspired by Dad, the boys decide to create a magic carpet to fly over Danville.
Candace overuses the boys' hair growing machine and is mistaken for a rare orangutan. The boys build a bustworthy bounce house in their back garden.
It's the stone age, and Phinabunk and Gerb decide to invent the wheel. It's 16th century China, and Phineas and Ferb set out to rescue kidnapped Princess Isabella from Doofus Khan.
Candace is thrilled when Mom wants to spend the day with her, as it gives her a chance to bust the boys at last. Doof thinks Vanessa overheard him saying he would like to have a son to help him, so he zaps her with his Forget-About-It-inator.
Candace is in bed with an injured ankle, so the boys help stop her getting bored - and she unwittingly saves their cosmonaut friend from an approaching obstacle. On the last day of their family road trip, the boys decide to build a diner on top of their mobile home.
The boys decide to make a giant version of their childhood game around the town. Baljeet believes he comes from a family of losers, so the boys bring in legendary Tour de France winner Greg LeMond to inspire him for the Great Tri-State Bike Race.
Ferb's cousins from England challenge him and his friends to a soccer game. The boys build a 3D electronic soccer field. Candace gets an English accent and has to deal with it when Jeremy comes to visit her.
Perry wins a contest and becomes the spokesanimal for Totally Tools, jeopardising his secret identity. Dad competes in the L.O.V.E. M.U.F.F.I.N. Pageant of Evil against Doof.
It's Halloween night and the kids encounter a strange boy who is convinced his house is haunted. Candace is bitten by a bat after watching a popular vampire movie with Stacy and worries that she is becoming a vampire.
Inspired by an antique escape chamber their father has acquired, the boys build a computer-controlled tower that has a mind of its own and traps them inside. Craziness has ensued in Danville and no one has any idea what's going on.
Phineas and Ferb create a new form of communication, titled Ferb Latin. The Tri-State Area has run out of potatoes, so the boys extract DNA from their last crisp to create new potatoes.
The boys decide to put on a traditional family Christmas special featuring their family, friends and a few very special guests, including Grammy winning recording artist Kelly Clarkson. The episode features three new holiday songs - Isabella's "Let it Snow," a Buford and Baljeet rendition of "Good King Wenscelas," and the whole gang singing "We Wish You a Merry Christmas."
The boys seek to locate Crikey the Crocodile and return him to the Danville Nature Preserve. The boys create their own television shows and commercials starring their friends.
When Phineas and Ferb can't find Perry, they decide to create the Perrytronic 3000, a mechanical structure that can assume any form. The boys decide to invent "S'Fall," a colorful world full of giant leaf piles and gourds.
During medieval times, Phineas and Ferb (or, Ferb-a-lot) set off on an epic quest to find the legendary sword, Excaliferb, so they can defeat the evil sorcerer, Millifishmirtz.
Candace asks the boys to recreate Jeremy's gift to her, using information from her subconscious. Phineas and Ferb build a special ant farm which makes ants grow bigger.
An errant blast from Doofenshmirtz' Babe-inator turns Phineas and Ferb into toddlers with Candace in charge of them. Ohio Flynn and Rhode Island Fletcher set off to Central America to help a damsel in distress.
Follow Paul the Delivery Man as he journeys to Phineas and Ferb's house and Doofenshmirtz Evil Inc. The boys use an anti-gravity device to suspend trampolines all over town to bounce on.
When Mom asks the kids to be quiet while she takes her online knitting test, Phineas and Ferb create ninja outfits. Baljeet stops being Buford's nerd, so Buford joins up with Doof, making things difficult for Perry.
When Mum is out of Doonkelberries for her famous Doonkelberry pie, the boys rush out to find some for her. The visiting French Fireside Girls help Isabella capture an American grizzly bear, one of the world's most dangerous creatures.
Candace's plans to hang out with Jeremy are derailed after he becomes interested in playing Phineas and Ferb's newest game, jet pack volleyball. Phineas and Ferb create a flying saucer to help solve the mystery of crop circles.
Meap's world is put in danger and the boys try to help him save the universe when they travel to Seattle. Meanwhile, Doofenshmirtz visits former nemesis Peter the Panda.
Phineas and Ferb ask Candace what she wants to do today. An intellectually enhanced Baljeet becomes the greatest threat to mankind.
Vanessa and Major Monogram's son, Monty, have coffee together. For a special Ducky Momo figurine, Candace makes multiple deals through Danville's annual Antique Show and Swap Meet.
Doofenshmirtz turns himself into a platypus to defeat Perry. Doofenshmirtz has jury duty, so Norm takes over the day's evil scheme ─ to destroy Danville by using weapons.
Phineas and Ferb discover that a planet is hurtling directly toward Earth. Perry gets stuck in the desert with Dr. Doofenshmirtz.
The Flynn-Fletchers are off on an African safari, leaving Perry at home to deal with Doofenshmirtz and his most evil plot yet: to take over the O.W.C.A. But when Doofenshmirtz accidentally zaps Carl the intern with his Ultimate-Evil-Inator ray, Carl takes over the O.W.C.A. (Organization Without a Cool Acronym) and imprisons Doof and Monogram. Agent P steps in but gets zapped with Doof’s many rays and in the cliffhanger of all cliffhangers, disappears.
Agent P's fate is finally revealed in the action-packed finale of the two-part television special that left Phineas, Ferb and the gang hanging...literally off an unchartered gorge and Candace frantic over a phone call with Jeremy that left their relationship status in limbo. Now, with Agent P nowhere in sight, Dr. Doofenshmirtz and Major Monogram square off against evil Carl who controls a set of familiar-looking robots to take over the OWCA, in one of the biggest battles yet.
Candace is put in charge of Phineas and Ferb just before they seize the opportunity to make the most of Danville's electricity blackout; Phineas and the gang introduce Ferb and Perry to their newest project - training domesticated squirrels to live in the wild.
Agent P quickly figures out there is more to Norm's odd reality show that celebrates the eventful life of his creator Dr. Doofenshmirtz, which is recreated through flashbacks and special guests.
Buford messes with the wiring of Phineas and Ferb's giant tire swing contraption, and creates a ray which turns Candace into a fly. Phineas and Ferb complete the reconstruction of Dad's classic car entry for the Doo-Wop Hop event.
Phineas and Ferb take a hockey game to the extreme. The boys plan their own New Year's Eve ball drop while Candace makes a resolution to stop busting her brothers.
Buford tries to keep Phineas and Ferb's invention from disappearing. The boys create a new invention using recycled parts from past projects.
Candace is chosen as Rutabaga Princess and gets to start the Running of the Chinchillas. The boys join the fun and create rutabaga themed vehicles for her big day.
The boys make a giant inflatable wading pool for Mom. Candace reveals her "Emo" side. Doofenshmirtz attempts to become ruler of all bees. / Isabella and the Fireside Girls turn themselves into bees. Poofenplotz tries to become Queen of the World by stealing and consuming massive amounts of royal jelly.
Agent P teams up with an estranged former human partner named Lyla to stop a hijacked train to save the train's passengers and Canada's national treasure - a moose named Albert.
Candace thinks she can trap the boys at last when they ask her to call Mom if they get stuck in their giant Gordian Knot, but is distracted by helping Jeremy open his mini-safe. / The gang switches bodies with alien tourists for a free intergalactic vacation.
Perry comes face to face with an Australian platypus hunter set on destroying him. Baljeet is having an existential emergency and finds himself incapable of making decisions.
The boys set out to prove the existence of the elusive Chupacabra. Phineas and the Gang celebrate Isabella's birthday in a big way.
When Candace thinks Jeremy is bored with their usual hangouts, she sets out to find something unique to do with him; When Pinky goes missing, Phineas and Ferb create a machine that will amplify Buford's senses to those of a dog's.
Spider-Man, Iron Man, Thor and Hulk stand powerless after being struck by Dr. Doofenshmirtz's power-draining "inator." Once the supervillains – Red Skull, Whiplash, Venom and M.O.D.O.K. – find out that Dr. Doofenshmirtz is responsible for robbing the superheroes of their powers, they seek him out and together create mayhem in Danville. Meanwhile, Phineas and Ferb do everything they can to restore the superheroes' powers before the evil villains take over the world.
Carl bribes Monty into helping him to get some much needed acknowledgement from Monogram. Inspired by Candace's book club selection, the boys decide to re-enact the Trojan War but with their own twist.
When Linda becomes overwhelmed for organizing a block party, she asks Phineas and Ferb for help. Norm falls in love with Rodney's female robot. / Candace and Stacy compete in Phineas and Ferb’s Ultimate Obstacle Course. Doofenshmirtz plans to humiliate his brother, the Mayor.
Candace asks for Phineas and Ferb's help making Jeremy's birthday gift. Phineas and Ferb have an unlucky day while Doof has a very lucky one as a result of his Good Luckinator.
Doof creates a new item called a back-to-the-store-inator. Phineas and Ferb make a device that enhances the wind, and test it with kites.
Phineas and Ferb discover a commemorative coin from the 1903 Danville World's Fair. Isabella plans an impromptu picnic for Phineas when the rest of the gang have plans of their own.
Candace brings her plush Ducky to life. Doofenshmirtz encounters a Giant Floating Baby Head. Phineas, Ferb, and their friends confront a horde of evil platypuses.
Doofenshmirtz inherits a castle in Druselstein, so Vanessa moves her Halloween party to the new place. Doofenshmirtz develops a theory that enlarging small, cute animals into giant beasts will help him take over the Tri-State area.
Phineas and the gang help Love Händel prove the existence of Klimpaloon, the magical old-timey bathing suit that lives in the Himalayas, to verify that their song, "The Ballad of Klimpaloon", is legitimate.
After facing the choice of imprisonment or community service, Doof becomes a teacher at Vanessa's school. Meanwhile, a trio of bugs embark on a journey to become the first insects to communicate with humans. / Perry helps Doof in retrieving his father's old lawn gnome. Meanwhile, Phineas and Ferb help out their father on Father's Day
Isabella unintentionally admits her feelings for Phineas in a letter. Meanwhile, Doof invents an inator to help change his misfortune / Candace is accidentally hit by the Impersonator-inator which changes her appearance to a pizza delivery guy, but uses this appearance to help her better understand boys.
After Doofenshmirtz is defeated, a new threat in the 2nd Dimension emerges, leaving it up to Phineas, Ferb, Candace and her resistance fighters to defeat this new foe.
When Isabella and the Fireside Girls' marionette show turns out less than spectacular, Phineas and Ferb offer their help. Perry tries to stop Doof from winning the Grand Prix.
Doofenshmirtz gets kidnapped by Professor Mystery, and Phineas and Ferb discover a giant time capsule that fell from the sky. / Doofenshmirtz teaches an Inator Method seminar.
It's been 10 years after the events of the present, and Phineas must decide what university to go to. After discovering that Isabella had a crush on him for years, Phineas must reach her before she leaves for college and express his true feelings for her. Meanwhile, Doofenshmirtz has a mid-life crisis.
Doof's latest inator changes the way the Earth moves and it is up to Phineas and the gang to save summer.
Doofenshmirtz's latest "inator" turns Danville citizens into contagious zombies. Agent P. and the gang try to save the town and avoid becoming zombies themselves.
In a parallel universe far, far away, Phineas and Ferb are tasked with returning the Death Star plans to the Rebel Alliance before Storm trooper Candace catches up to them. Meanwhile, complications arise when Perry is trapped in carbonite.
It's the last day of summer and Phineas and Ferb decide to seize the day. Unfortunately for Candace, this means it's also her last chance to bust her brothers... or is it?
Dr. Doofenshmirtz and Major Monogram have their hearts set on revealing the top 10 musical numbers from Seasons 2 and 3, but soon find out that celebrity host Kelly Osbourne has been brought in to fill the role. Unwilling to submit to playing second fiddle, Doofenshmirtz makes it his mission to thwart Kelly until Perry the Platypus sets out to stop his nemesis from ruining the entire show. Maia Mitchell ("Teen Beach Movie") also guest stars.
In the midst of training three new animal agents, Doof and Perry have a serious falling out.
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, and 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 giant zoetrope that goes on an adventure of its own; the kids build a massive 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 while 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.
After Doof turns into a Mothman and eats Perry's hat, they pay a visit to the OWCA Haberdasher; the boys build a space adventure film set to help Baljeet learn to act.
Meap enlists the kids to help bust his nemesis, Mitch, before he can steal a long-lost treasure hidden somewhere on Earth.
The kids and Candace each have a sleepover party on the same night; the kids build a western town while Agent P is captured by Doofenshmirtz's swamp-dwelling cousin, Bubba Doof.
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.
To settle a debate between Dr. Doofenshmirtz and Major Monogram, O.W.C.A. and L.O.V.E. M.U.F.F.I.N. square off in a soccer match; Doof attempts to give his own flawed personality to his brother Roger, but his inator hits lots of different people, including Phineas and Ferb.
When Buford is sick in bed, Baljeet forces him to watch an episode of Baljeet’s favorite sci-fi show; Isabella is eager to impress foreign emissaries at Droogenfest, but Doof’s plan get in her way. Meanwhile, the boys grow the world’s largest doonkelberry.
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.
Trapped in a mall elevator, Phineas and Ferb think inside the box as Candace tries to make her date; a cosmic traveler warns of a space-time rip, forcing the boys to save the universe by doing nothing, meanwhile Perry enters Doof's trap academy.
Doof's fear of a vending machine apocalypse comes true while the kids have fun skipping rocks. Doof works to save Norm from the machines while the kids save the people of Danville.
