Phineas and Ferb investigate the myth of the legendary "Lake Nose Monster", an inhabitant of Lake Nose. Meanwhile, Doofenshmirtz uses a machine to filter all of the zinc out of the water of the lake, even though he experiences trouble thinking of an evil scheme that could involve zinc, and Candace gets a job as a lifeguard on the lake's beach when Jeremy also works there as a lifeguard.
Phineas and Ferb build a translator to see if Perry's chattering noises actually mean anything, but they discover it can work on other animals too. Meanwhile, Doofenshmirtz tries to flood the Tri-State Area so he can make it like Venice and force everyone to buy his new Buoyancy Operated Aquatic Transport, or BO-AT for short. Phineas and Ferb learn what the word "aglet" means and try to spread awareness of this to the world, while a disbelieving Candace and Stacy uses the campaign as an opportun
Candace uses a growth elixir Phineas and Ferb created to become tall enough to audition for a modeling career at a local festival after finding that she was not tall enough to do so, but as a result, she becomes a giant, causing an argument over her between the festival's modeling audition lady and an eccentric oddball show owner. Meanwhile, with the festival's annoyance, Doofenshmirtz plots to cover the festival with the smell of dirty diapers. Phineas and Ferb build a giant aquarium in their b
Phineas and Ferb are inspired to make gelatin in their pool after Candace tells them to do something with their dessert, but when Doofenshmirtz demonstrates his newest invention, the "Turn Everything Evil-inator", it literally brings the gelatin to life. The Flynn-Fletchers and Stacy visit London, where Stacy and Candace investigate Phineas and Ferb’s newest scheme, a water slide from the top of Big Ben that ends on the London Eye, in the style of Sherlock Holmes. Meanwhile, Perry collaborates w
Candace tries to figure out where all of Phineas and Ferb's creations always go. Meanwhile, Doofenshmirtz experiments with a ray that can make things invisible. Phineas and Ferb open a platypus themed restaurant in their backyard, which quickly becomes the trendiest restaurant in town. Jeremy takes Candace there, but both of them have to deal with Buford who refuses to let them in. Meanwhile, Doofenshmirtz goes on a date at the restaurant with a woman also interested in evil, but threatens to us
When Phineas and Ferb find an egg, they believe it belongs to Perry, so they build a mechanical contraption to care for it. When Candace sees what her brothers are doing, her maternal instincts emerge and she agrees to help, on the condition that they do things her way. Meanwhile, Doofenshmirtz plots revenge on whales who told his girlfriend to dump him by means of a whale translation device he created. Phineas and Ferb create their own video game and program themselves into it. When Candace is
When Phineas and Ferb accidentally knock a spacecraft out of the air with a remote-controlled baseball, Candace discovers an alien named Meap, who she initially believes is a plush toy that had been "robotized" by her brothers. However, when Phineas, Ferb and Isabella are captured by Mitch, an alien poacher trying to capture the "cute" creature, Candace and Meap are forced to help rescue them. Meanwhile, when Doofenshmirtz tries to retrieve a balloon he had treated as a friend in his childhood u
When Candace meets Mandy, the sister of a pair of brothers who also like to build ambitious projects, the two ultimately force their brothers to compete in building forts. Meanwhile at a family reunion, Doofenshmirtz tries to win a game of kickball with a robotic kicking leg. Phineas and Ferb build a massive passenger plane entirely out of papier-mâché, aiming to break the record of the longest wingspan held by the famous Spruce Goose. Meanwhile, at Jeremy's pool party, Candace grows jealous whe
When Candace finds out Jeremy will be starring in a television commercial, she eagerly joins a game show that Phineas and Ferb are producing, competing head-to-head with Buford in hopes of catching Jeremy's attention. Meanwhile, Doofenshmirtz hatches a plan to melt all the local TV station towers, hoping to break his unhealthy addiction to late-night infomercial shopping. Phineas and Ferb help Isabella and the Fireside Girls meet their fundraising goals by building the world's most elaborate aut
When Perry is reassigned to a new villain after Doofenshmirtz is downgraded to a low-level threat, he is ordered to leave the Flynn-Fletcher household and relocate to the new villain's area; the boys believe Perry has gone missing and try to find him. Meanwhile, after learning of his downgrade, Doofenshmirtz confronts Perry's new nemesis, but ends up accepting an internship with the new villain. After a storm leaves them stranded on a remote island, Phineas, Ferb and Isabella construct an elabor
Buford has a new game, "Jump and Duck", which everyone is loving the look of. But Phineas is always one for a challenge, and Candace's comment about a game "sucking them in" is just the inspiration he needs to create a virtual reality machine of "Jump and Duck". The trouble begins when Candace, in her preparations for a Cotillion Jeremy has asked her to, gets pulled in before the boys. Meanwhile, Doofenshmirtz has a slightly more disturbing childhood horror revenge story, but is the song and dan
After encountering them in the future, an older version of Candace decides to steal Phineas and Ferb's time machine and go back in time to the day they built a rollercoaster so she can help the present Candace catch them in the act. However, when her actions cause a chain reaction turning the future into a dystopian society led by Doofenshmirtz, the future Candace decides to enlist her present brothers to help restore the good future. Guest stars: Jennifer Stone as Amanda, Noah Munck as Xavier,
When Phineas and Ferb decide to play a game of indoor hide-and-seek, they shrink themselves, their friends, and their enthusiastic, self-proclaimed biggest fan Irving using a shrinking machine, since the house feels too small at full size. Candace, determined to bust them, accidentally shrinks herself in the process. Meanwhile, Doofenshmirtz plants a nanobot on Perry in an attempt to discover where he lives. Baljeet tries to impress a childhood friend visiting from India, enlisting Phineas and F
Baljeet recruits Phineas and Ferb to help create a song for a summer camp concert. Meanwhile, Candace plays matchmaker by setting Stacy up with Coltrane, all while getting frustrated that Jeremy has not given her a nickname. Elsewhere, Doofenshmirtz plots to create an army of babies by broadcasting his heartbeat across Danville on a loudspeaker. Doofenshmirtz tasks Vanessa with retrieving a container from a mall that holds a rare element, hoping to prove she is responsible enough for a car, and
Candace finds a rabbit outside her house and decides to take it in as a pet. However, the rabbit is actually a rogue agent named Dennis, whom Perry is trying to prevent from hacking into O.W.C.A.’s mainframe. Meanwhile, Phineas and Ferb develop actual X-ray glasses after being ripped off by a novelty variety, and due to Perry's absence, Doofenshmirtz appoints a potted plant as his nemesis. Candace becomes sidetracked from a scheduled spa appointment and goes with Stacy to work at a construction
When Phineas and Ferb create the largest and most unpoppable bubble ever, they, the Fireside Girls, Buford and Baljeet get trapped inside it flying around the city. Meanwhile, Candace practices driving and Doofenshmirtz uses a voice-altering cowboy hat to help him spread propaganda through country-and-western music. In a side story of the previous episode, Isabella and her Fireside Girls troop try to retrieve a rare variety of tree sap for Phineas and Ferb's bubble project from an abandoned amus
After feeling depressed when Jeremy cancels his date with her, Phineas and Ferb try to cheer Candace up. Meanwhile, Perry is discharged from the agency after he is accused of a series of crimes, only though he later discovers that Doofenshmirtz has framed Perry using various different clones of him. Candace joins the Fireside Girls and tries to get 50 patches in one day so she can get tickets to see a Paisley Sideburn Brothers performance at their jamboree. Meanwhile, Doofenshmirtz tries to halt
Buford vows to become Baljeet's slave after he saves him from choking. Meanwhile, Candace tries to prevent Jeremy from seeing embarrassing photos she accidentally sent to his cell phone, and Doofenshmirtz plots revenge on an ice cream truck driver who once ran over his foot. When Lawrence accidentally sells Candace's Little Mary McGuffin doll to Doofenshmirtz, who plans to give it to his daughter Vanessa as a gift, Phineas and Ferb take on the case like classic TV detectives. Meanwhile, Doofensh
When one of Doofenshmirtz's inventions lands in their front yard, Phineas and Ferb try to figure out what it does. Meanwhile, Doofenshmirtz and Perry find themselves stuck aboard Doofenshmirtz's malfunctioning hover jet as it spirals out of control with no one steering. On a trip to the beach, Phineas and Ferb discover the lost city of Atlantis. Meanwhile, Candace enters a sandcastle-building contest judged by Jeremy, and Doofenshmirtz attempts to use a growth formula to turn ordinary plants int
When Phineas and Ferb invent a teleporter that can retrieve objects from anywhere by scanning photographs, Candace tries to expose it to her mother by teleporting her back from a Mexican-Jewish cultural festival. Meanwhile, Doofenshmirtz sets out to rid the world of mimes by trapping them in real invisible boxes. Jeremy is doubtful about his dancing abilities when he agrees to partner with Candace on the popular television show Let's All Dance Until We're Sick, so Phineas and Ferb create an exos
When Lawrence accidentally has his memory erased by a gadget in Perry’s lair just before a father-daughter race with Candace, Perry uses a robot version of Lawrence to fill in for him. Meanwhile, Doofenshmirtz invents "Eulg," a substance that works opposite of glue, breaking things apart rather than sticking them together. Candace inadvertently agrees to babysit Jeremy's little sister, Suzy, and the two team up in an attempt to bust the boys. Meanwhile, Phineas, Ferb, and their friends build a r
After Phineas, Ferb, and their friends help decorate the city of Danville to celebrate the arrival of Santa Claus, Doofenshmirtz, having finally found a reason to hate Christmas, uses his "Naughty-inator" in an attempt to ruin the holidays for everyone. As a result, the boys and their friends try to help save Christmas for Danville. Guest stars: Clancy Brown as Santa Claus and Big Bad Voodoo Daddy as themselves
When Phineas and Ferb build an Anti-Gravity Fun Launcher, Carl stumbles upon their plans online and mistakenly believes they are working for Doofenshmirtz, prompting him to go undercover. Meanwhile, Doofenshmirtz gets his hands on the plans and tries to put them to evil use, while Perry is sent on a literal wild goose chase to retrieve a missing agent, deemed too close to the boys to investigate them himself. Phineas and Ferb help the neighborhood kids build floats for the annual "Tri-State Area
When Phineas and Ferb invent a high-tech orb that allows its user to pass through solid objects in order to help find Linda's lucky guitar pick, Candace tries to use it as a way to finally bust her brothers. Meanwhile, Doofenshmirtz plots to destroy a statue honoring Roger. Candace is thrilled to be the bridesmaid at her Aunt Tiana's wedding, but when it gets moved to the backyard, Phineas and Ferb's wild preparations threaten to ruin Candace's vision for the perfect wedding. Meanwhile, Doofensh
After binge-watching a sci-fi movie marathon, Candace becomes convinced that Ferb is secretly an alien. Meanwhile, Doofenshmirtz tries to auction off one of his old inventions, the "Wrapped-Up-In-A-Nice-Little-Bow-inator", which compresses objects into small wrapped boxes—by marketing it as a cleaning device. Phineas and Ferb decide to trick out the kiddie rides in front of the Tri-State Mart, but when Candace steps into the rocket ride and is unexpectedly blasted across Danville, the gang embar
In order to wash their house quickly, Phineas and Ferb build a contraption that spins it around, causing Candace to collapse. She soon finds herself in a dream world reminiscent of The Wizard of Oz. Following the yellow brick sidewalk to Bustopolis, Candace seeks out the Wizard to help her bust her brothers, only to discover that evil forces are after the magical boots that have mysteriously grown on her feet.
Phineas and Ferb build an indestructible suit to navigate an extremely dangerous obstacle course, but after using it to help someone, they are mistaken for a superhero and decide to become "The Beak" to fight crime. However, things are not all smooth sailing: a new villain, Khaka Peü Peü, arrives in Danville to challenge them, and Phineas's constant disappearances to fight crime as The Beak begin to strain his friendship with Isabella. Meanwhile, out of fear of being blamed for the supervillain
Irving's older brother, Albert, does not believe Phineas and Ferb are anything special and insists he can prove it. Determined to prove him wrong, Irving convinces Baljeet and Buford to pose as the boys while the real Phineas and Ferb are at the movies with their dad. Meanwhile, Doofenshmirtz, frustrated with the poor quality of accessories for his model train set, decides to shrink various national monuments to add to his collection. Candace enlists Stacy and Jenny to help her bust Phineas and
Phineas and Ferb discover a chameleon and decide to keep it as a pet, but when it grows to a gigantic size due to one of Doofenshmirtz's inventions, the boys and Isabella struggle to track it down, especially with its camouflage. Meanwhile, Doofenshmirtz takes a guitar lesson from Jeremy to learn a song that will summon aliens to do his bidding. Phineas and Ferb host a backyard rodeo featuring robotic bulls to help Isabella's Fireside Girls earn their Rodeo Clown Patch, while Candace tries to st
Phineas and Ferb build an advanced all-terrain vehicle, while Baljeet, Stacy, and Candace attend a convention where Candace hopes to improve her "busting tactics." Meanwhile, Doofenshmirtz attempts to host a Telethon of Evil. Phineas and Ferb build the tallest building ever to increase Danville's popularity, while Candace enlists the help of Irving's brother, Albert, to bust them. Meanwhile, Doofenshmirtz attempts to rotate the moon to its dark side in an effort to become the most evil man in th