Phineas and Ferb decide to become a one hit wonder, Phineas and the Ferb-Tones and Candace wins the chance to sing with them. Meanwhile, Perry must stop Doofinshmirtz's giant robot - disguised as a temp.

Phineas and Ferb enter the family car in an auto race, while Candace has to bust them and impress Jeremy. Meanwhile, Perry must stop Dr. Doofenshmirtz from deflating every inflatable object in the tri-state area.

Upon hearing that her favorite play is being made a movie, Candace rushes to try for the lead, only to see that Phineas and Ferb have become the directors and changed the script to include a little more insanity. Meanwhile, Perry goes to Doofinshmirtz Evil Inc. to find out why Heinz has been so quiet lately.

Candace becomes a model, and is forced to wear outfits designed by Phineas and Ferb while Doofenshmirtz designs a machine to create clones of himself, to avoid having to wait in line.

The boys use a sno-cone machine to create a Winter paradise during the middle of Summer in their backyard, Candace tries to pursue Jeremy (who thinks dropped her for a Swedish exchange student), and Doofenshmirtz tries to melt chocolate with a machine made from laser pointers.

Phineas and Ferb make the biggest ice cream maker for Isabella after her tonsils are taken out. Doofenshmirtz's daughter, Vanessa, spends the day at his lair and tries to convince his ex-wife that he's evil.

Candace uses a reality show to secretly film her brothers designing a white-water rafting ride. Meanwhile, Perry must crush Doofenshmirtz' dream of becoming a magician, as well as dominating the tri-state area.

When Buford's goldfish goes missing, the boys help him find it out at sea. Meanwhile, Dr. Doofenshmirtz tries to destroy a tape of him 'saving' a kitten from a tree.

The guys decide to hold a competition between the girls to see which are better at sports. Also, the build a telescope in the backyard. Then, Jeremy's sister is tormenting Candace. Doofenshmirtz wants to be the winner of a dog show, and makes an attempt to liquefy a steak.

When Django feels down for not being able to draw art on the same scale as his father, Phineas and Ferb get some big ideas for his piece and the famous "unpainted desert". Meanwhile, Perry faces off against Doofenshmirtz, as he does his best to impress his visiting evil professor.

When Doofenshmirtz's brother Roger is elected mayor, he decides to build his own country, where he can rule over everything, but how will he stop him when Perry is having trouble entering his hideout? Meanwhile, Phineas and Ferb, in an attempt to help Isabella see her "first" rainbow, create the Rainbow-enator, which harnesses the power of their breakfast cereal to make the light show. The strangest anomaly of the episode, however, is when Candace and Vanessa manage to get their clothes mixed up at the dry-cleaners, resulting in a backwards day for everyone.

Curious as to what Perry's chirping sound really means, Phineas and Ferb create a "Perry Translator". But they soon find it's not just bound to translating platypuses, platypi, platypeople? Meanwhile, Perry himself is caught in a plan involving a shark cage that is half off, a remote to open the dam, complicated acronyms and the high tech BO-AT.

While in London, Candace and Stacy decide to take a page out of Sherlock Holmes'…entire collection, to figure out what Phineas and Ferb have planned for the London Eye. Meanwhile, Perry must team up with British agent 00 Zero in order to stop Dr. Doofenshmirtz from moving Big Ben to the Tri-State Area.

Fed up with her brother's inventions always disappearing, Candace enlists the help of everyone in the neighbourhood to build and watch a big and obvious invention, that they might finally see exactly what happens to everything. Meanwhile, is it mime? No, it's Doofenshmirtz' new Invisibility Ray.

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.

Visiting relatives of the Flynns' neighbors bear an uncanny resemblance to Candace, Phineas and Ferb. Meanwhile, Perry finds himself in the middle of Dr. Doofenshmirtz's family reunion.

Perry the Platypus is reassigned and forced to move to the Quad State area with a new family and battle a new villain, the Regurgitator. During his new assignment, Phineas, Ferb, and Candace put in every effort to find him, hoping he'll return to them.

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

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.

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

Candace panics when she inadvertently agrees to babysit Jeremy's little sister Suzy but to her surprise, Suzy is docile in the absence of her brother, saying that when Jeremy isn't around, she's "off the clock." The two of them bond and Suzy shows Candace how to get Phineas and Ferb to bust themselves. Meanwhile, the boys build a replica of Niagara Falls in their backyard with the intention of riding over the falls in a barrel. Back at Doofenshmirtz Evil Inc., Dr. Doofenshmirtz decides to increase his carbon footprint, (though he doesn't know what that is), by inventing a Carbon Footprint-inator.

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 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.

It's the summer solstice, so Phineas, Ferb, and their friends decide to travel around the world in one day in an effort to create the "biggest, longest, funnest summer day of all time". But not everyone believes they can actually achieve what they have set out to do, especially Buford. Candace tags along because Jeremy is on a trip to Paris, and she fears that there he may meet other girls. Also, Isabella finds her affections for Phineas sorely tested when his steadfast focus on achieving his goal puts pressure on her. Meanwhile, Dr. Doofenshmirtz takes a father trip to Tokyo, Japan with Vanessa, but sets out with Perry and Major Monogram to find her when she joins Phineas, Ferb and the others.

Candace accidentally gets hit by Phineas and Ferb's molecular separator 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 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 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.

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.

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, then he finds Sarcastic Norm Head, the Norm head prototype that has an affinity for sarcasm, later Doofenshmirtz and Perry watch an exercise show.

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." Meanwhile, Norm shares his feelings of wanting to be a real boy with Dr. Doofenshmirtz and decides to play up the "son" role. Back at the Flynn-Fletcher household, Candace has Stacy hypnotize her into ignoring the need to bust her brothers so that she can spend the entire afternoon relaxing with Jeremy, but unfortunately the hypnosis trigger words end up playing right into her date with Jeremy.

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.

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.

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.

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.

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.

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.

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.

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 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.

The boys make a giant inflatable wading pool for Mom. Candace reveals her "Emo" side. Doofenshmirtz attempts to become ruler of all bees.

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.

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.