Phineas and Ferb remodel Mount Rushmore for Candace's 15th birthday, while Agent P stops Dr. Doofenshmirtz from making a tunnel to China.
Phineas and Ferb enter the Swamp Oil 500 after upgrading mom's car and turning it into race car 42. Meanwhile, Dr. Doofenshmirtz tries to deflate everything in the Tri-State Area from his blimp. --- Phineas and Ferb build a huge paradise of a beach in their backyard on the hottest day of the year. Meanwhile, Agent P tries to stop Dr. Doofenshmirtz from stealing all lawn gnomes in the Tri-State Area in revenge for having to dress as one in his youth.
A visit to a dude ranch turns into a stampede/cattle drive through town and the cows become acrobats at a water park. Dr. Doofenshmirtz starts an aluminum siding business. --- Phineas and Ferb use a snow-cone machine to create S'Winter, a unique and logic-defying amalgam of Winter and Summer. Meanwhile, Candace follows Jeremy around after noticing him hanging out with what looks like a girl. Elsewhere, Dr. Doofenshmirtz plans to melt all the chocolate in the Tri-State Area with his Melt-inator 65000.
While watching a mummy movie with their dad Lawrence, Phineas and Ferb decide to go in search of a real mummy only to find a familiar mummy. Meanwhile, Dr. Doofenshmirtz attempts to create some beachfront property. --- Candace tries out for The Next Super American Pop Teen Idol Star, but Phineas and Ferb take another route to stardom. Meanwhile, Perry the Platypus tries to stop the evil Dr. Doofenshmirtz from taking over the Tri-State Area with a giant building-shaped robot.
Buford challenges Phineas to a thumb-wrestling competition after embarrassing him. Phineas receives training by guest star Evander Holyfield. Meanwhile, Dr. Doofenshmirtz invents the Slave-inator to get people to attend his birthday, and clean up afterward. Dr. Doofenshmirtz just writes on his keyboard what he wants people to do for him, his orders appear in a giant screen, people get hypnotized and immediately they do it. --- The boys direct a film adaption of Candace’s favorite play, but they transform this beautiful play into a full-out monster movie. Meanwhile, Perry the Platypus tries to find out why Dr. Doofenshmirtz is being so quiet. This episode guest stars a live-action Candace, who is played by her voice actress, Ashley Tisdale.
Phineas and Ferb build a tree house and remodel Candace's old one. Later, they get in a Tree House Fight against Candace and Stacy. Meanwhile, Perry tries to stop Dr. Doofenshmirtz from getting revenge on his brother Roger, who is also the mayor of Danville.
Phineas and Ferb repair a broken time machine from the museum, and they then travel back in time, accidentally taking Candace with them. The Fireside Girls build a replacement machine to rescue them. Meanwhile, Doofenshmirtz replaces Perry with a new nemesis named Peter the Panda, making Perry depressed.
The boys create a circus for the neighborhood after their original circus plans are canceled, while Jeremy gives Candace wild parsnips which she is allergic to. Doofenshmirtz creates a device to make people's voices higher so his own voice will seem lower but instead, it gets even higher than it originally was.
When Isabella is cursed with a bad case of the hiccups, Phineas decides to build her a super haunted house to scare 'em out of her. Meanwhile, Perry stops Dr. Doofenshmirtz from destroying his old mentor's hideout, and Candace tries to go to Jeremy's house, but his evil sister Suzy stops her.
The Flynn-Fletchers are in England visiting Lawrence's parents, Reginald and Winifred. During their trip, Phineas and Ferb decide to hold a medieval tournament after hearing their grandfather's story about the Black Knight of Worcestershire. Candace also participates in the festivities only to impress Charles. Agent P infiltrates EvilCon to see what Dr. Doofenshmirtz is up to. --- Phineas and Ferb build robot versions of themselves, Phinedroids and Ferbots, to help out with their Big Ideas. Meanwhile, Dr. Doofenshmirtz regrets all the messages he left on his girlfriend's answering machine.
Today is Linda's birthday and Candace tries to make it the best birthday ever. But every time she does, Phineas and Ferb beat her to it. Meanwhile, Dr. Doofenshmirtz tries to shrink everything that he hates so he never has to see them. --- Isabella's dog, Pinky, eats her Fireside Girls sash, so the boys build a mini-submarine to retrieve it, but they end up inside Candace instead. Perry is forced to take direct action when Dr. Doofenshmirtz's latest scheme specifically threatens Phineas and Ferb.
Phineas and Ferb join Gaston Le Mode's runway, and their outfits become the newest fashion trend. At the same time, Candace tries to become the newest fashion model. Meanwhile, Dr. Doofenshmirtz creates clones of himself so they can wait in line for him. --- The boys make the biggest ice-cream maker for Isabella after her tonsils are taken out. Vanessa Doofenshmirtz spends the day at her dad's company, trying to convince her mom that he's evil, in the same style as Candace to Linda.
Phineas and Ferb help Candace learn how to parallel park by building a monster truck track in the backyard. Meanwhile, Dr. Doofenshmirtz is marketing his new line of monster trucks to investors, and proceeds to try and get rid of the competition. --- Phineas and Ferb with their friends search for the treasure of Badbeard. Meanwhile, Dr. Doofenshmirtz moves into his new lair in Spleen Island. Candace touches the orange moss and "hallucinates", seeing Perry as a secret agent.
Lawrence forgets his wedding anniversary, so Phineas and Ferb help him make it up to Linda by getting their favorite band together for a reunion concert. Meanwhile, Perry helps Doofenshmirtz to put together a party for his daughter's Sweet 16. Little does her father understand she's not that sweet anymore.
Candace and Stacy get to travel with their favorite band only to find out that they're real snobs. Meanwhile, Phineas and Ferb become secret agents for a day after finding one of Perry's secret lair entrances. Now Perry has to protect the boys while trying to stop Doofenshmirtz. --- Phineas and Ferb help their grandfather relive his glory days as a daredevil. Dr. Doofenshmirtz seeks revenge against a childhood bully that always kicked sand on him.
Phineas and Ferb build a flying car and Candace finally busts them. They get sent to reform school to have their spirits broken and imaginations removed.
Phineas and Ferb have a chariot race with Buford and Baljeet, Isabella and the Fireside Girls, and Candace. Meanwhile, Dr. Doofenshmirtz creates Norm, a robotic man designed to destroy platypi, like Perry. --- Upset that her brothers always get off scot-free, Candace finds a show called “Bust ‘Em!” that goes around filming little brothers to get them in trouble. Meanwhile, Heinz Doofenshmirtz recalls his failed magic career and decides to create a new ice age.
Betty Jo Flynn and Hildegard Johnson have a roller derby rematch: Betty Jo, Ferb and Candace against Hildegard, Jeremy and Suzy. But Candace is worried that if her team wins, Jeremy might not like her anymore. Meanwhile, Dr. Doofenshmirtz is out to destroy a statue of Rutherford B. Hayes, but is plagued by a terrible headache. --- Phineas and Ferb decide to do absolutely nothing for the day. Candace questions her purpose in life after realizing that she can't bust her brothers for doing nothing. Dr. Doofenshmirtz is tired of being the ugliest person around, so he invents a device that can turn anything and anyone ugly.
Phineas and Ferb revive a caveman from a glacier, but the caveman gets loose into a costume party Candace is attending, and she mistakes him for Jeremy. Meanwhile, Dr. Doofenshmirtz plans to destroy all people dressed as sandwiches. --- After Buford loses his goldfish, Phineas and Ferb help him search for it. An accidental good deed causes Dr. Doofenshmirtz endless trouble.
While Candace is sick in bed, Stacy takes her place and tries to bust Phineas and Ferb for building a gigantic miniature golf course. Meanwhile, Dr. Doofenshmirtz takes a day off from being evil. --- After watching an old sci-fi movie, Phineas and Ferb are inspired to create a teleportation device which causes Candace and Perry to switch bodies. Meanwhile, Dr. Doofenshmirtz has a grudge against a company mascot.
A traffic camera DVD in the neighborhood gives Candace photographic proof of her brothers' activities, but Agent P is sent on a mission to destroy that DVD, because it has recorded his comings and goings as a secret agent. To do that, he needs to get some help from a familiar robot created by a familiar scientist. --- Phineas and Ferb try to set the world record for the world’s largest bowling ball as well as the largest pinball table. Meanwhile, Dr. Doofenshmirtz dabbles in selling addictive hot chocolate.
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
Because of Isabella and Buford’s argument about boys being better than girls and vice-versa, Phineas and Ferb create the "F Games" to find out who’s better: boys or girls? Meanwhile, Agent P stops Dr. Doofenshmirtz’s plan to win a dog show. --- Phineas and Ferb carve pictures of their faces into a comet. Meanwhile, Candace tries to spend some time in the park with Jeremy, but her dreams were shattered when Jeremy's sister, Suzy is there as well. Meanwhile, Dr. Doofenshmirtz steals all the steaks from the Tri-State Area.
Phineas and Ferb are inspired by their dad's favorite kids show to create a cartoon with super-powered versions of themselves and their friends. Doofenshmirtz creates a machine that causes people to dance uncontrollably. --- Candace and Vanessa accidentally get their clothes switched at the dry cleaners. Dr. Doofenshmirtz builds his own evil empire on an inner tube and Vanessa tries to bust him. Meanwhile, Phineas and Ferb create a Rainbow-inator to show Isabella her first rainbow.
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 decide to find out what Perry's chatter means. However, they later find out that the Perry translator works on all animals and decide to use it to help all of the animals in Danville. Meanwhile, Candace tries to spend some time with Jeremy, but she keeps being interrupted by Suzy's poodle, and Dr. Doofenshmirtz tries to flood the Tri-State Area, and invents a vehicle that drives on water. / The boys decide to spread the word about the tip of the shoelace, called the "aglet." Meanwhile, Doofenshmirtz is featured in the newest viral video to hit the internet.
Phineas and Ferb help Baljeet with his Festival entry for the biggest watermelon using a growth elixir which Candace uses in order to increase her height in order to be the next Flawless Girl. Elsewhere, Dr. Doofenshmirtz plans to cover the Festival with the "worst smell in the history of mankind". / After their pet goldfish did so much for them, Phineas and Ferb build an aquarium in their backyard as a way of saying thanks. Meanwhile, Candace awaits a call from Jeremy and Perry the Platypus stops Doofenshmirtz from destroying Hot Dog vendors.
Candace’s gelatin party inspires Phineas and Ferb to use Isabella's swimming pool for making gelatin. Doofenshmirtz invites Agent Perry the Platypus over for tea. The diabolical doc made a devilish device that can make anything evil. Doc tried to zap A.P. with this ray. A.P. dodged so the ray zapped the gelatin. It turned evil and came to obey doc. The gelatin monster grabbed A.P. who threw his hat at the fire-extinguisher sprinkler. The water dissolved the gel and also fried the electronics in doc's zapper hence ruining doc's plans. / While in London, Candace and Stacy emulate Sherlock Holmes and Dr. Watson, while trying to bust Phineas and Ferb. Meanwhile, Perry must team up with British agent Double-0 0 in order to stop Dr. Doofenshmirtz from moving Big Ben to the Tri-State Area.
Thanks to Stacy's advice, Candace tries to figure out how Phineas and Ferb's crazy creations disappear every time before their Mom sees it. Dr. Doofenshmirtz creates an Invisible Ray to make the Fireside Girls invisible when they come knocking to sell him cupcakes. / Phineas and Ferb open Chez Platypus, which becomes the trendiest restaurant in town. Jeremy asks Candace out on a date to the restaurant. Meanwhile, Doofenshmirtz goes on another date from his online dating service, and vows to destroy all love in the Tri-State Area if the date doesn't go well.
Phineas and Ferb find an egg and believe it's Perry's, and they take care of it until Candace decides to teach them how to properly take care of an egg. Meanwhile, Heinz Doofenshmirtz plans to get revenge on whales for stealing his old girlfriend. / Phineas and Ferb accidentally trap Candace in a video game and have to help her out so that she can get ready for the cotillion. Meanwhile, Perry has to stop Doofenshmirtz from zapping men into wearing ball gowns with the Ballgowninator.
It's another average, logic defying day for Phineas and Ferb, until a crashed space pod, carrying an unbearably cute alien, Meap, thrusts the boys into another adventure in space! Everyone has a different role to play, while Candace holds on to Meap by accident, Ferb is fixing up the ship, as Phineas uses the new cute tracker to find where their new friend is, to the slight irritation of Isabella, as he can't get what *cough* is causing cute interference, but of course, it all has to lead up to the big explosive finale in SPACE -ace-ace. Meanwhile, Doofenshmirtz has a new plan, simplistic in nature, but buried in an avalanche of backstory, oh dears.
The Flynn-Fletcher's neighbors have relatives visiting who bear an uncanny resemblance to Candace, Phineas, and Ferb. In fact, older sister Mandy has two younger brothers, Thaddeus and Thor, who drive her crazy with their ambitious projects. Although Candace and Mandy initially bond, they soon compete, urging their brothers to build the best backyard fort. Meanwhile, Perry finds himself in the middle of Dr. Doofenshmirtz's family reunion where Dr. Doofenshmirtz tries to win the annual kickball tournament with the Kick-inator 5000. / Phineas and Ferb set out to build a bigger plane than Howard Hughes' wooden Spruce Goose, so they build it out of papier-mâché, to do a similar theme to the Spruce Goose, complete with in-flight service and entertainment. Dr. Doofenshmirtz is doing his part to be green by using recycled materials to build an "Evaporator-inator" to dry up all the pools in the Tri-State area. Meanwhile, Candace and Stacy attend Jeremy's pool party only to discover an adventu
When Candace learns that Jeremy will star in a TV commercial, she worries that, with his new-found celebrity, he will forget about her. So, as Phineas and Ferb produce their own TV game show, Candace uses the opportunity to get herself on the airwaves. Meanwhile, Dr. Doofenshmirtz tries to erase all infomercials in the Tri-State Area. / Phineas and Ferb help Isabella and the Fireside Girls by building an automatic car wash to help with fundraising to save the star-nosed mole. Meanwhile, Stacy advises Candace to play hard to get with Jeremy. But when Jeremy asked Candace out for a ride to her brother's car wash, she ignores her BFF's advise and goes on the date, anyway. Elsewhere, Dr. Doofenshmirtz tries to make a mountain out of a molehill - literally.
When Phineas and Ferb think Perry is lost, they use the power of music to find him. Meanwhile, Candace, who fears she is at fault for Perry's disappearance, combs the Tri-State area to find him. As it turns out, Doofenshmirtz has been downgraded to a low-level threat and Perry has been reassigned to a more dangerous villain and a new family. / The Flynn-Fletcher family becomes marooned after a summer storm shipwrecks them on an island, and Phineas, Ferb and Isabella use the opportunity to build a Swiss Family style tree house which angers an already irritated Candace who wants to get back in time for Jeremy's party. Meanwhile, on the same island, Dr. Doofenshmirtz uses free monkey labor to boost a new laundromat business.
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 fuses metal with wood. There they encounter a 35-year-old Candace, who follows them back through time and finally busts them as they are building their roller coaster, but also accidentally foils Agent P's plan to defeat Dr. Doofenshmirtz, setting off a chain reaction that turns the future into a dystopian society.
To play a game of indoor hide-and-seek Phineas and Ferb shrink down their friends including, their new extreme fan, Irving. Meanwhile, Dr. Doofenshmirtz attaches a nanobot to Perry in an attempt to discover where he lives. / Phineas and Ferb build a ocean liner so that Baljeet can go on a romantic cruise with his friend Mishti, whom he now notices is a very pretty girl. Meanwhile, Doofenshmirtz wants to move all the lighthouses to the other side of town so that he can get a good night's sleep instead of hearing the constant noice from the boats surrounding the bay by his headquarters
Phineas and Ferb learn that Baljeet has signed up for rock camp and worries he may get his first failing grade. So the boys help by forming a band to help him express his feelings, especially for math. Meanwhile, Candace wonders why Jeremy doesn't give her a cool nickname as Stacy gets close to Coltrane, the rock camp director. Doofenshmirtz's latest plan has him wanting his own army of babies by broadcasting his heartbeat all over the tristate area. / Vanessa Doofenshirtmz tries to convince her dad that she's responsible enough to have her own car. For that, she has to get a special chemical for him in hopes she doesn't always have to ride with him on the family scooter. At the mega mall, a chase for the chemical ensues as it's tossed around between Candace and Stacy, Buford and Baljeet, and Ferb, who joins Vanessa's quest in hopes he'll be able to get her attention.
When Candace finds a rabbit, she wants him as her pet, but in hindsight, he's actually a rogue agent trying to find Perry's secret lair for information. Meanwhile, Phineas and Ferb try to make x-ray glasses. And since Perry isn't around to stop his latest plot, Doofenshirtmz faces an unusual new foe. / Stacy has a spa day planned for herself and Candace, but they get side tracked when Jeremy is participating in a house-building program for the homeless and Candace joins as well in hopes of impressing him. Fortunately, the girls are able to get their spa day after all when Phineas and Ferb build their own spa with its own special features. Meanwhile, Doofenshmritz finds a cat which causes a lot of problems when he's trying to carry out his latest evil plot.
The boys are able to create a giant bubble which enables them and their friends to float and view all of Danville from above as Candace tries to bust them while on a practice drive with Mom for her learner's permit. Meanwhile, Dr. Doofenshmirtz tries to gain popularity by singing country and western music and Perry must stop him before the concert crowd submits to his latest invention. / Isabella and the Fireside Girls set out to find the rare maraca nut tree so they can get its much needed sap for Phineas and Ferb's bubble invention. Their quest leads them to an old abandoned amusement park. Meanwhile, Pinky the Chihuahua must stop his archenemy, Professor Poofenplotz, from acquiring her favorite brand of hair spray, which she needs to look beautiful enough in order to plan taking over the world. The last of the discontinued product is located at the same amusement park.
Phineas and Ferb give Candace the ultimate makeover. / Candace hopes to join the Fireside Girls before the Paisley Sideburn Brothers perform.
After Baljeet saves him, Buford vows to become Baljeet's slave. / Dad accidentally sells Candace's favorite doll at a yard sale. Phineas and Ferb become detectives and interview various people to find the doll. Meanwhile, Perry the Platypus tries to get the doll back from his nemesis.
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.
After Ferb accidentally leaves his skateboard at his grandparents' house, he and Phineas develop a teleportation device that can retrieve any object. Meanwhile, Dr. Doofenshmirtz tries to rid the world of mimes. / Unsure of his own dancing skills when he agrees to go on a TV show with Candace, Phineas and Ferb develop a device to help Jeremy imitate the dance moves of a professional. Meanwhile, Dr. Doofenshmirtz and several other villains try to broadcast an evil message during the taping of the show.
Lawrence's memory is accidentally erased by a gadget in Perry's lair before participating in a father-daughter race with Candace, so Perry operates a robot version of Lawrence to fill in for him. Meanwhile, Dr. Doofenshmirtz invents an opposite of glue named "Eulg," which breaks stuff apart rather than join it together. / Candace and Suzy try to get Phineas and Ferb to bust themselves, the boys build a replica of Niagara Falls so they can ride a barrel over it, Doofenshmirtz builds a device to increase his carbon footprint.
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 the boys build an Anti-Gravity Fun Launcher, Carl accidentally intercepts their plans and assumes they are working for Dr. Doofenshmirtz, so he is sent undercover to figure out what they are doing. Meanwhile, Perry tries to find a lost agent, and Dr. Doofenshmirtz also acquires the blueprints to help with a parking issue on his street. / Phineas and Ferb decide to help build floats for all the neighborhood kids in the yearly "Tri-State Area Unification Day" parade, but a family grudge leads Buford and his family to try and wreak havoc on the parade.
Phineas and Ferb create an orb that allows its user to pass through objects to help find Linda's guitar pick, Dr. Doofenshmirtz tries to destroy a statue honoring his brother Roger. / 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. Meanwhile, Dr. Doofenshmirtz tries to transform food into junk food
After watching a sci-fi movie marathon, Candace becomes convinced that Ferb is an alien. Meanwhile, Dr. Doofenshmirtz tries to market an evil invention by claiming it to be a cleaning device. / The boys trick out the kiddie rides at a store, 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’s brother Albert doesn’t believe that Phineas and Ferb are anything special, and since he claims to be the “Truth Detector,” he can prove it. Desperate to prove Albert wrong, Irving convinces Baljeet and Buford to pose as Phineas and Ferb beside a giant hologram of the boys’ Eiffel Tower construction. Meanwhile, Dr. Doofenshmirtz is fed up with the quality of accessories for his model train set, and decides to shrink down a variety of national monuments to add to his collection. / Candace, Stacy, and Jenny team up to try and bust Phineas and Ferb together. Meanwhile, Dr. Doofenshmirtz enlists a new robot to replace Norm, but a power surge causes it to glitch and turn against him.
Phineas and Ferb find a chameleon in the backyard, who grows to the size of a dinosaur, thanks to Doofenshmirtz's Gigant-Inator, and takes a walk through downtown. Meanwhile, Jeremy teaches a song to Doofenshmirtz, who plans to use it to summon aliens to do his bidding. / Phineas and Ferb build a robotic rodeo in the backyard. Candace tries to prove she can focus so she can go to a concert with Stacy. Doofenshmirtz stalls to finish his entry into the Inator Creator competition.
Phineas and Ferb are building an ATV powerful enough to handle extreme terrains and even buildings. Meanwhile, Candace and Stacy go to a leadership seminar where Candace learns the steps needed to achieve her ultimate goal of busting her brothers. Dr. Doofenshmirtz is hosting a Telethon of Evil. / Phineas and Ferb plan to put Danville on the map by building the world's tallest building. However, Candace teams up with Albert and utilizes his expertise to bust her brothers. Meanwhile, Dr. Doofenshmirtz wants to be responsible for all the evil in the Tri-state area, and since he believes that evil levels rise during a full moon, he plans to rotate it so that only the infamous "dark side of the moon" faces Earth.
Candace is awarded the opportunity to be mayor for the day, so she create laws that can bust her brothers. Back at home, Phineas and Ferb build an authentic log cabin and pioneer village. Meanwhile, Dr. Doofenshmirtz is scheduled to play golf with his brother Rodger but isn't happy about it. / Phineas and Ferb build the ultimate lemonade stand and begin to offer franchise opportunities. Meanwhile, Candace and Stacy’s relationship is put to the test when Candace feels she must pick between their friendship and busting her brothers, while Dr. Doofenshmirtz creates a “Paper-Cut-Inator” so that he can make millions selling band-aids.
Phineas and Ferb create a life sized maze filled with fun obstacles. Melissa, the leader of the Little Sparks, a younger branch of the Fireside Girls, is immediately captivated when she meets Candace and finds out that she was a Fireside Girl who earned 50 patches in one day. When the girls try out the maze, Candace takes charge, but things don’t go as planned. Meanwhile, Dr. Doofenshmirtz reasons that if the Leaning Tower of Pisa can generate souvenir revenue, then surely he can use his latest invention, the "Tilt-inator," to tilt buildings so he can sell souvenir replicas. / When Linda is asked to do a Lindana reunion concert, Lawrence worries that she might be missing the excitement of her old life, so he asks the boys to help turn him into a pop star so that he can perform at the concert and show mom he too is an exciting guy. Across town, Dr. Doofenshmirtz plans a faux alien invasion in order to take over the Tri-State area.
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 find a lava necklace of bad luck, and Doofenshmirtz creates a De-Evolution-inator.
Candace accidentally gets hit by a "splitter" ray which causes her to have two different personalities - Romantic Candace and Busting Candace, so the boys have to figure out a way to put her back together again. Meanwhile, Dr. Doofenshmirtz tries to get over his irrational fear of high diving, but he figures that if he can't, he will just use his "Look-away-inator" to zap everyone so that they do not witness his shame. / Phineas, Ferb and the gang are all sick with a cold, so they decide to make it the best "sick day" ever by creating a live television feed to their friends' homes so that they can all enjoy a day of fun together. Meanwhile, Vanessa learns from her mom, Charlene, that her dad is picking her up from a party she is going to with her punk rock boyfriend Johnny and is worried that he will embarrass her yet again. However, Dr. Doofenshmirtz is busy trying to use his "Deevolution-ator" to drain Agent P's will power so that he can control him, and things get out of hand when D
Candace switches places with a princess who looks exactly like her, while the real princess helps the boys build a giant jukebox filled with live bands / When Linda and Lawrence go on a trip, Candace decides to have an Intimate Get Together with Stacy and Jenny. But, then more people come and makes it into a party. Later, when her parents get home, Candace gets busted.
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.
Phineas and Ferb's newest invention is a pair of boots that make the wearer extraordinarily fast. Candace decides to wear them so that she can be in two places at once; at Jeremy's family picnic, where she runs into Mrs. Johnson, and also at the library where she promised Mom she would read to the kids. Meanwhile, Dr. Doofenshmirtz's building is put up for sale so he tries to convince a prospective buyer, Annabelle, who turns out to be a long lost relative of the Johnson family, that it is not worth buying. / While visiting their grandparents, the kids decide to create and race a giant hot air balloon. Meanwhile, Candace is inspired by train engineer Glenda's can-do attitude and decides to "give up" on busting her brothers. On the other side of town, Dr. Doofenshmirtz finds a Dodo bird egg and is convinced that it is a fierce bird-monster that can help him take over the Tri-state area, but discovers the exact opposite when the egg hatches.
The third season begins with Phineas and Ferb building a gigantic biome during a bit of bad weather to help Isabella earn a Fireside Girl patch. / Candace realizes that she needs to spend more time with Stacy, so she vows to spend the whole day with her only. But while visiting Jeremy and his mom, Mrs. Johnson, Dr. Doofenshmirtz's "combine-inator" zaps her and Jeremy, literally joining them at the hip. Meanwhile, Phineas and Ferb build a giant robot dog that causes a lot of mischief.
For Harbor Days Festival, Phineas and Ferb celebrate by creating a mechanical version of the historical elusive shark of Danville Harbor. Seeing what the boys are up to, Candace enlists some help to capture the mysterious shark. Meanwhile, Dr. Doofenshmirtz invents the 'Salt Water Taffy-inator' to give cavities to every kid in the Tri-State Area. / Inspired by the lost verse from the nursery rhyme, "Hey, Diddle Diddle", the boys decide to take some cows to the moon to see if its low gravitational pull actually does produce the best tasting ice cream ever. Back at home, Candace decides to take advantage of the boys being gone and attempts to make a fancy dinner for Jeremy, but her lack of cooking skills don't add anything to the plate. Meanwhile, Dr. Doofenshmirtz attempts to use his 'Moisture Suck-inator' to turn his neighbor's plants brown, so that his plants will be greener by comparison.
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.
When Candace discovers that Phineas and Ferb have invented a computer that can answer anything, she asks it how she can finally bust her brothers once and for all. Meanwhile, Dr. Doofenshmirtz loses the key to his latest invention, the "All Purpose-inator," and Agent P must find it before he does. / Perry misses his 100th battle against Dr. Doofenshmirtz when Candace takes him to the Charity Pet Wash with her. Perry's absence goes unnoticed when the zookeeper's typical platypus at the Danville Zoo stops Dr. Doofenshmirtz's plan to zap his brother with his "Least Likely-inator." Meanwhile, the boys build a fun house Phineas and Ferb style.
Candace has no choice but to go to her brothers for help after she loses her phone for the fifth time. Unbeknownst to her, the phone that they invent for her has a voice activated phone transfer app that sends her to Easter Island. Meanwhile, back at Evil Inc., Dr. Doofenshmirtz invents a "Pick 'Em Up-inator" to pick Vanessa up from class so that he can deal with Sarcastic Norm Head, the Norm head prototype that has an affinity for sarcasm. / Inspired by Dad's favorite childhood program, the boys decide to create a magic carpet, and Candace is convinced that fortune cookies will lead her to bust her brothers. Meanwhile, Dr. Doofenshmirtz plans on ruining his brother's art unveiling by using his "Stain-inator" to ruin a mysterious painting, but as it turns out, the painting is Dr. Doofenshmirtz's very own masterpiece that he created when he was a youth back in Gimmelshtump.
Candace gets a bad haircut and must rely on Phineas and Ferb's hair growing machine to correct it before she attends the Endangered Animal Benefit with Jeremy and his mom. However, when Candace turns up the power, her hair grows much more than expected and she is mistaken for a rare tangerine orangutan. Meanwhile, Dr. Doofenshmirtz is developing his Very, Very 'Bad-inator.' / Mom joins Jamie Oliver as one of the judges for Danville's Meatloaf Festival Cook-off, as he stresses healthy eating and fresh ingredients. Meanwhile, Candace puts a bid on a prized souvenir resembling band members Nigel and Adrian from her favorite band, Tiny Cowboy, at the Rock and Roll Memorabilia Auction, but gets distracted when her brothers build a bounce house in their backyard. On the other side of town, Dr. Doofenshmirtz has plans to enter his family meatloaf recipe into the competition using "evil" as the special ingredient.
It’s the Stone Age and Phineas and Ferb are cavemen who decide to invent something new, fun and useful…the wheel! Meanwhile, Dr. Doofenshmirtz attempts to make his digs more upscale by using the precursor to the Inator device... a plain old stick. / In ancient feudal China, Princess Isabella is part ruler and Master Perry has given up the way of the warrior. After Phineas and Ferb witness Doofus Khan capture the Princess and take her as a prisoner, they track down Master Perry and convince him to teach them his warrior ways so they can rescue Princess Isabella and save China.
When Mom tells Candace she wants to spend the day with her, Candace spends the entire time with her in the backyard so that she can bust her brothers. Unfortunately, Phineas and Ferb's grand plan for the day only entail watching the grass grow after getting zapped by Dr. Doofenshmirtz's Dull-and-Boring-inator earlier that day. Meanwhile, Agent P partners up with Dr. Doofenshmirtz to fix the now destroyed Dull-and-Boring-inator into a Dynamic-inator in order to fix Phineas and Ferb. / When Dr. Doofenshmirtz thinks Vanessa overhears him say he would rather have a son to do his evil bidding, he feels terrible so he intends to zap her with the "Forget-about-it-Inator."
After Candace injures her ankle and is told to stay in bed, she drives herself crazy trying to get her Mom's attention in order to bust her brothers. Fortunately, Phineas and Ferb provide her with a box of items to stave off her boredom. However, it ends up being more of a hindrance, until she unknowingly helps the boys warn their cosmonaut friend about a dangerous obstacle approaching them. Meanwhile, Perry interrupts Dr. Doofenshmirtz's Chicken Soup themed escapade. / On the last day of the Flynn-Fletcher family road trip, Candace thinks she’ll finally have a couple of hours to relax and not worry about busting her brothers. However, Phineas and Ferb decide to build a truck stop diner on top of the RV. Meanwhile, Doofenshmirtz is also doing a road trip, but he’s using a big rig to transport his boom juice across the Tri-State Area.
Phineas and Ferb build a giant version of a favorite childhood game, with Danville as the central location. Meanwhile, Doofenshmirtz takes Vanessa on a camping trip. / Phineas and Ferb enlist the help of cyclist Greg LeMond to help Baljeet compete in a bicycle race. Meanwhile, Doofenshmirtz tries to bring the city to a standstill so he can bid on an auction unopposed.
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
The executive of Totally Tools oversees a contest to find the company’s "spokesanimal," and Perry is crowned the winner. However, the victory puts Perry's secret identity in jeopardy, forcing Major Monogram to appoint Agent S as a temporary replacement, but when Dr. Doofenshmirtz sees his new nemesis is Sergei the Snail, he mistakenly underestimates his new opponent. Meanwhile, Candace has been welcomed into Mandy’s "Stop the Busting" retreat, which aims to teach Candace to control the urge to bust her brothers through positive reinforcement. / When Lawrence heads out to attend a speaking engagement on antiques, he unwittingly finds himself participating in the L.O.V.E.M.U.F.F.I.N. Pageant of Evil against Dr. Doofenshmirtz and Rodney.
It's Halloween night and the kids encounter a strange boy named Russell who is convinced his house is haunted. Meanwhile, Dr. Doofenshmirtz's disdain for grass causes him to invent a "mind-transfer-inator" enabling him to merge minds with a cow and destroy all the grass in the Tri-State Area. Unfortunately, his plan backfires and he transforms into a scary "were-cow" that wreaks havoc any time there is a full moon. It's now up to Agent P to stop him and save Danville. / Candace is bitten by a bat after watching a popular vampire movie with Stacy and worries that she is becoming a vampire. Phineas and Ferb's latest gadgets lead Candace to believe that she has indeed made the change from teenager to teen vampire. Meanwhile, Dr. Doofenshmirtz plans to change the Tri-State Area into a carbon copy of Gimmelshtump so that it will be easier to take over.
When Phineas and Ferb are inspired by an antique escape chamber that Dad acquires, they decide to build a computer-controlled tower that will trap them inside and allow them to explore the world of escapement. Meanwhile, Dr. Doofenshmirtz invents a "Rude-Inator" to ruin Roger's meeting with a visiting dignitary from England. / Craziness has ensued in Danville and no one has any idea what’s going on. The wackiness unfolds when Phineas and Ferb create Cheesetopia, Doofenshmirtz makes Perry his butler with his Butler-inator, and Carl is trapped by Doof while in a squirrel costume. All is explained, in an episode of Phineas and Ferb that starts at the end and works its way back to the beginning.
Phineas and Ferb create their own language, Ferb Latin, which quickly catches on. Unfortunately for Candace, she awakes from a massage puzzled to find everyone else speaking a language she doesn't understand. Meanwhile, Dr. Doofenshmirtz decides to use propaganda as his new "-inator," believing that it will work since people will believe anything they read. / Potato gremlins appear all over town when Phineas and Ferb clone a potato chip from Buford and it mixes with his DNA; Doofenshmirtz tries to summon the Spartan army with his historical army retrieve-inator.
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."
When the boys learn that the famous Crikey the Crocodile has gone missing, they set out to find and return him to his home at the Danville Nature Preserve. Meanwhile, to Candace's amazement, Irving reveals his digital scrapbook compilation of all of Phineas and Ferb's wild creations, and guest star Ray Liotta fills in for Major Monogram to give Perry his mission. Also, Dr. Doofenshmirtz plans to embarrass his brother by using his 'Chicken-Replace-inator' to replace Roger's mayoral award with the nearest chicken. / Phineas and Ferb create their own TV shows and commercials.
When Phineas and Ferb can’t find Perry, they decide to create the Perrytronic 3000, a mechanical structure that can assume any form. Of course, being aware of the boys’ every move, Candace decides to take a different tactic on her busting approach by using a new technique that keeps Phineas and Ferb from finishing their Perry project. Meanwhile, Doofenshmirtz invents a Duplicator-Inator-2 so that he can duplicate his own head and make himself twice as smart. / With Fall around the corner, Phineas and Ferb decide to invent "S'Fall," a colorful world full of giant leaf piles and gourds. Meanwhile, over at Evil Inc., Dr. Doofenshmirtz is mentoring Rodrigo, a budding student of evil. Unfortunately, Rodrigo truly is evil, and when he captures Dr. Doofenshmirtz and Agent P., it’s up to Major Monogram's son, Monty, to save the day.
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.
After losing a gift that Jeremy made for her, Candace is determined to recreate it before Jeremy realizes it’s missing. Unfortunately, Candace can’t remember what it looks like, so she enlists Phineas and Ferb to use their mind machine to enter into her subconscious and recapture the memory. Meanwhile, Doofenshmirtz’s evil plan is to use his Underwear-Inator to take over the Tri-State Area, since everyone's greatest fear is being caught in public in their underwear. / Thinking it would be cool to be part of an ant society, Phineas and Ferb create and infiltrate the Antius Maximus, a massive ant farm filled with giant ants. Suspecting that the boys are up to something, Candace accidentally drenches herself in the ant pheromones and follows them inside. Meanwhile, Doofenshmirtz feels tired and lethargic after eating turkey and decides to create a Turkey-Inator that will create a sleeping epidemic in Danville by turning things into giant irresistible turkeys.
Candace's plans to watch over Phineas and Ferb backfire when Dr. Doofenshmirtz's "Babe-inator" turns her brothers into babies. After having an epiphany, Dr. Doofenshmirtz shows up at the OWCA to give up his evil ways. Agent P has no choice but to show Dr. Doofenshmirtz the ropes of the trade, but things quickly sour between the two after Dr. Doofenshmirtz accidentally exposes the identity of a fellow animal agent. / After locating and retrieving the Amulet of Juatchdoon, adventuring archeologist duo Ohio (Phineas) Flynn and Rhode Island (Ferb) Fletcher set off to South America to help Damsel in Distress Isabella find the Lost Temple of Juatchadoon and her missing mother. However, Dr. Doofenshmirtz has other plans for the amulet - to awaken the evil corn colossus to give him the power to destroy the world.
Paul the Delivery Guy discovers his job has a higher calling to save Danville as he makes stops at Phineas and Ferb's house, Doofenshmirtz Evil, Inc., Danville City Hall and the OWCA, in a special episode seen through his eyes. The rock band, Love Händel, returns for some musical accompaniment. Meanwhile, at Doofenshmirtz Evil Inc., Perry has lost the tools in his hat. / Inspired by Ferb's personal anti-gravity device, Phineas thinks it would be fun to suspend trampolines all over Danville.
After Mom asks the kids to keep quiet while she prepares for her online knitting test, Phineas and Ferb create ninja outfits designed to hide the wearer from anyone who is not wearing them. Meanwhile, Candace becomes increasingly frustrated after she can’t find the boys and bust them. Across town, Dr. Doofenshmirtz invents the De-Handsome-Inator. / Baljeet announces that he is no longer Buford's nerd, and Buford is heartbroken.
When Mom is out of Doonkleberries for her famous Doonkleberry pie, the boys set out to find some for her. Meanwhile, Perry and Dr. Doofenshmirtz find themselves across the ocean as Doofenshmirtz returns home to renew his Druesselsteinian driver’s license. Back in Danville, Candace is convinced she has discovered the answer to her busting problem. / Brigitte, Josette, and Colette, the visiting Fireside Girls from France, help Isabella capture the American Grizzly Bear, one of the world's most dangerous creatures. Buford's plan to jokingly dress up as the bear backfires when he discovers the identity of Brigitte, throwing him off his game. Back at their grandparents' cabin, Phineas and Ferb create the most amazing "run-through-the-sprinkler" experience. Meanwhile, Dr. Doofenshmirtz's loathing of pretzels drives him to create the "De-Twist-Inator" to untwist every pretzel in Danville.
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. Meanwhile, when Dr. Doofenshmirtz discovers he invents "-inators" in his sleep, he decides to go back into his dreams to find out what is happening. / Phineas and Ferb create their own flying saucer to help solve the mystery of a recent rash of crop circles. Meanwhile, Candace tries to give up her tattling habit by taking a "me" day, and across town, Dr. Doofenshmirtz challenges the local pizzeria's "37 Minutes or it's Free" rule by using his "dough-blow-inator" to generate a powerful current of air to hold the pizza dough aloft indefinitely.
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.
When the boys ask Candace to decide what they should do for the day, she slyly asks them to invent a device to attract their Mom so that she can finally bust her brothers. Meanwhile, Dr. Doofenshmirtz has invented a "Baby-Cry-Inator" designed to tarnish his goodie-two-shoes brother's image with the electorate. / When Baljeet becomes concerned that he is losing his mental edge, the boys invent a cerebral stimulatory hat, or "Brain booster," to help him. But when the hat exceeds expectations and makes Baljeet exponentially smarter, he suddenly views everyone else as beneath him and becomes a threat to civilization by taking Earth's atmosphere and bringing it to the moon. Meanwhile, Dr. Doofenshmirtz plans to use his "Key-Find-Inator" to collect all the keys in Danville in hopes that it will lead to the Key to the City.
Candace tries to bust Phineas and Ferb when they put on an enormous backyard magic show, while Vanessa and Major Monogram's son Monty get coffee together despite their warring fathers. Meanwhile, Dr. Doofenshmirtz tries to become hip in an attempt to get youthful followers. / The guys help their dad unearth a missing piece of Danville history; Doofenshmirtz tries to make himself younger to win a children's film festival.
Candace accidentally turns into a fluid when she comes into contact with a device that turns solids into liquids. Meanwhile, Doofenshmirtz turns himself into a platypus to defeat Perry in battle. / Candace finds it difficult to bust Phineas and Ferb when her brothers build nanobots that can assemble into any object they can imagine. Meanwhile, Dr. Doofenshmirtz has jury duty, so Norm takes over the day’s evil scheme -- to destroy Danville by using weapons.
After discovering that a strange planet is hurtling directly towards Danville, Phineas and Ferb set out to avert a disaster, while Buford looks forward to making contact with its alien race. Meanwhile, Dr. Doofenshmirtz hopes to steal the world's largest ball of twine. / When one of Dr. Doofenshmirtz's "-inators" zaps him and Agent P into the middle of nowhere, they must embark on a comical journey filled with twists and turns to return home.
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 while Dr. Doofenshmirtz tries to use pity to his advantage. / Phineas and the gang introduce Ferb and Perry to their newest project - training domesticated squirrels to live in the wild. Meanwhile, Dr. Doofenshmirtz aims to do a better job of seeing through his evil plans now that Agent P is back.
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 removes a part from a tire swing the boys are building and it accidentally shoots a ray that turns Candace into a fly. Meanwhile, Doofenshmirtz is suffering from evil scientist’s block. / It's time for Danville's Doo Wop Hop and car show and the whole town is getting prepped for it. Doofenshmirtz is set on winning the show even if it means using his Rust-inator to turn all the other cars into red dust. Meanwhile, Candace's hope for a car of her own has come true, but it's not quite all she imagined.
National Hockey League star Luc Robitaille offers his assistance when Phineas and Ferb take an ice hockey game to the extreme. Meanwhile, Doofenshmirtz build an Abominable-inator to make himself bigger, scarier and hairer. / Phineas and Ferb plan their own New Year's Eve ball drop, complete with a customized multi-dimensional ball, while Candace makes it her resolution to refrain from busting her brothers before the clock hits midnight. Meanwhile, Doofenshmirtz uses a Resolution-Changer-inator in his tie as he continues the never-ending attempts to take over the Tri-State Area.
Candace challenges Buford to keep Phineas and Ferb’s invention from disappearing so that she can sweep in and casually bust her brothers. Across town, Doofenshmirtz has had one too many lattes and is experiencing an extra burst of evil energy. / The boys create a new invention using recycled parts from past projects. When Candace attempts to bust them, Mom is too exhausted from baking pies all night and can't figure out what Candace is trying to show her.
The boys create Rutabaga-themed vehicles when Candace is chosen to be Rutabaga princess and gets to start the "Running of the Chinchillas." Across town, Doofenshmirtz plans to turn himself into a real live Kinderlumper to scare Roger into relinquishing control of the Tri-State Area over to him. / Phineas and Ferb build a wall for climbing. Candace is recording a Fireside Girls book with Irving and loses her voice. Meanwhile, Dr. Doofenshmirtz creates the Just-Desserts-inator.
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 to the world, but Candace can't stand the wait and needs to first just prove it to Mom. Meanwhile, Doofenshmirtz has the brilliant idea to use his Switch-Place-Inator to remove hair from one person and give it to another so that he can in turn sell his hair growing tonic. / Phineas and the gang celebrate Isabella's birthday in a big way, but all she really wants is some quiet time with Phineas. Meanwhile, Doofenshmirtz has installed his Bugs Me-Inator onto an evil bug bus and is driving around Danville turning all the things that bug him literally into bugs.
When Candace thinks Jeremy is bored with their usual hangouts, she sets out to find something unique to do with him. Meanwhile, Phineas and Ferb power through town surfing on a giant ball of water and Doofenshmirtz plans to use his Double-Negative-Inator to confuse his local eatery into giving him a wintery drink that is usually not served during summer. / When Pinky goes missing, Phineas & Ferb create a machine that will amplify Buford’s senses to those of a dog’s. However, it works so well that the animal agents’ secret identities are put in jeopardy. Meanwhile, Candace tries to meet up with Jeremy for lunch at City Hall but gets stuck in a mandatory tour.
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.
After learning about Monty and Vanessa's secret relationship, Carl bribes Monty into helping him get some much needed acknowledgement from Monogram. Meanwhile, Candace is ecstatic when she discovers that her neighbor Peggy McGee has witnessed all of Phineas and Ferb's summer antics and is happy to tell Mom about them. Also, Dr. Doofenshmirtz creates its "Inflator-inator" to try to silence his neighbor who plays the bagpipes every day. / Inspired by Candace's book club selection, The Iliad, the boys reenact the Trojan War -- but with a Phineas and Ferb twist. Meanwhile, Perry discovers that Doofenshmirtz has a major problem with throwing things away so he helps him find his De-Clutter-Inator.
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.
When Candace is stumped about what to get Jeremy for his birthday, she reluctantly asks Phineas and Ferb for their help in creating the ultimate gift. Meanwhile, Doofenshmirtz plans to make fears a reality with his Worst-Fear-Inator, but his plans backfire when he finds himself battling his own fears instead. / When Candace is accidentally zapped by Doofenshmirtz’s Stinkelkrampen-Inator (aka Good Luck-Inator), she realizes she has a good chance of busting Phineas and Ferb.
Annoyed at waiting in really long lines at the return counter, Doofenshmirtz invents a "Back-to-the-Store-inator" to send things back to the store where they came. Meanwhile, Phineas and Ferb stage an extreme batting challenge their friends take place in, and Candace's obsession to bust coincides with her and Jeremy's visit to the Extreme Water Park. / Phineas and Ferb have created a device reinforcing the wind and test them on a giant kites in the park. Candace thinks she's finally going to bust when Mom gives her backyard a makeover. Meanwhile, Doofenshmirtz builds a Water-Zalewator to celebrate his girlfriend of the past, who doused him with water, because Heinz she loved, but who then gave him the basket.
When Phineas and Ferb discover a commemorative coin from the 1903 Danville World’s Fair, Lawrence recounts the events of the festival to them, in which steam-driven devices were introduced and a set of kids, who were very much like them, were preparing for the highly anticipated event. / Buford and Baljeet get in a food fight while Ferb is at the dentist. The Fireside Girls help Isabella plan a romantic picnic with Phineas. Meanwhile, Vanessa wants to go to a movie marathon, so Doofenshmirtz creates a Teleport-inator.
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.
Phineas and Ferb deejay at Vanessa's Halloween party. Doofenshmirtz hunts for hidden treasure in a castle. / After studying hours of horror movies, Doofenshmirtz develops a theory that enlarging small, cute animals into giant beasts will help him take over the Tri-State area. But when he puts his plan into action, he soon realizes it might be too much for him to handle. Meanwhile, Phineas and Ferb make a giant revolving foam city so they can safely perform skateboarding tricks, and Candace's tour of the Danville Space Laboratory gives her an opportunity for a high-tech bust.
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.
Doof gets rogue OWCA agent Dennis the Bunny to escape prison. Meanwhile, Phineas and Ferb make some improvements on the Fireside Girls' marionette show. / Agent P travels to the glamorous city of Montevillebad to stop Doof from winning the Grand Prix and collecting the prize money. When Doof uses his "I-don't-care-Inator" to sabotage the race and eliminate the competition, including international racing legend of Italian-Scottish-Swiss-Dutch descent Paolo Vanderbeek (Patrick Dempsey), Agent P must take the wheel and go head-to-head with Doof on the racetrack.
Doofenshmirtz gets kidnapped by Professor Mystery. Phineas and Ferb find a capsule with Bernie and Denise. / 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?
In the midst of training three new animal agents, Doof and Perry have a serious falling out.
