In the series premiere, Phineas Flynn and his older stepbrother Ferb build a rollercoaster for the neighborhood, much to their sister Candace's displeasure. Meanwhile, Perry, the boys' secret agent platypus, tries to stop his nemesis Dr. Doofenshmirtz from controlling the Earth's rotation with a magnet and a giant sheet of tin foil.
Phineas and Ferb build a backyard beach which Candace begins to enjoy, meanwhile Doofenshmirtz tries to steal all the lawn gnomes in the Tri-State Area.
Phineas and Ferb's song "Gitchee, Gitchee, Goo" becomes a one-hit wonder and brings them worldwide fame, while Candace wins a chance to sing on stage with them during the auditions for a reality music competition. Meanwhile, Doofenshmirtz turns his building into a giant robot to wreak terror upon the Tri-State Area.
The boys transform Mom's car into a remote-controlled race car and enter it into a race. Meanwhile, Doofenshmirtz uses his new invention, the Deflatinator, to try to deflate everything in the Tri-State Area, a device curiously mounted to a blimp.
Title Reference: The Fast and the Furious[disambiguation needed]
Candace stars in the movie The Princess Sensibilities. However she finds out that new directors Phineas and Ferb have changed it to The Curse of the Princess Monster. Meanwhile, Doofenshmirtz creates an Age-Acclerator-Inator to age cheese, but ends up trying to age Perry.
Phineas enters a thumb-wrestling competition with Buford after getting tips from boxing champion Evander Holyfield; Doofenshmirtz creates a hypnotic device to control people's minds so they will be forced to celebrate his birthday and clean up afterwards.
The boys plan to carve Candace's face into Mount Rushmore for her birthday; Perry tries to prevent Doofenshmirtz from boring a tunnel to the People's Republic of China from Mount Rushmore.
The boys clone themselves as Phinedroids and Ferbots (robots) so they can get more projects completed; Doofenshmirtz tries using a giant magnet to erase messages he left on his girlfriend's answering machine.
Candace tries to become a fashion model, while Phineas and Ferb create a fashion collection entitled "Summer All The Time". Doofenshmirtz designs a machine to create clones of himself so they can wait in line for him.
As a side-effect of Doofenshmirtz's plot to use termites to destroy all the wood in the area to help his new aluminum-siding business, Phineas, Ferb, and Isabella try to wrangle a herd of cattle from a ranch that were set free by the termites destroying their barn.
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.
The boys create a circus for the neighborhood after their original circus plans are cancelled, 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.
The boys visit an Egyptian-themed movie theater and attempt to get a mummy of their own, but they end up capturing Candace, who is wrapped in toilet paper; Doofenshmirtz tries to raise the city's water level by destroying a beaver dam so his real estate will become beachfront property.
14(12B) "I Scream, You Scream" February 17, 2008 N/A 112B
The boys try to make a giant ice-cream maker for Isabella after her tonsils are taken out; Doofenshmirtz tries to build a giant space laser, while his daughter, Vanessa, is staying with him for the weekend. Meanwhile, Candace, as usual, is trying to bust Phineas and Ferb, at the same time as Vanessa is trying to bust her dad, Dr. Doofenshmirtz. Ironically, Candace's mom and Vanessa's mom are attending a cooking class together.
After Candace sarcastically suggests that they can make a better toy than the Har D Har Toy Company's "Shimmy Jimmy", Phineas and Ferb design an "inaction figure" based on their pet platypus. Meanwhile, Doofenshmirtz plots to build toll booths to enter and exit the Tri-State Area so he can become rich.
16(6A) "Get That Bigfoot Outta My Face!" February 23, 2008 N/A 106A
Candace and the boys visit their grandparents at a lake house and the children try to scare her with a fake Bigfoot, but then their grandma's twin scares them with a more lifelike Bigfoot; Perry is trapped in Doofenshmirtz's love triangle as he bursts in while on a date.
The boys invent a monster truck for Candace to practice driving, but soon her practice run turns into a massive racing rally; Doofenshmirtz tries to discover investors for his line of monster trucks that are actual monsters.
Guest stars: Billy Ray Cyrus as Buck Buckerson.
18(11B) "Journey to the Center of Candace" February 29, 2008 N/A 111b
The boys build a shrinking submarine so they can go inside Isabella's pet chihuahua and retrieve a sash it ate, but they accidentally end up in Candace's stomach instead while she is on a date with Jeremy. Meanwhile, Perry tries to stop Doofenshmirtz's plans to destroy anyone who can't make up their mind with his newest invention, realizing that it may destroy Phineas and Ferb.
19(7a and 7b) "It's About Time!" March 1, 2008 N/A 107
Phineas and Ferb decide to repair a time machine at a natural history museum, sending themselves and Candace to the Jurassic Age. Meanwhile, Dr. Doofenshmirtz replaces Perry the Platypus as his nemesis with a secret agent panda, causing Perry to become depressed.
The boys locate their parents' favorite band, Love Handel, to perform a reunion concert in the backyard to make up for their Dad forgetting his wedding anniversary. Meanwhile, Doofenshmirtz plans a surprise birthday party for his daughter, Vanessa, also planning to launch Perry the Platypus on a giant firecracker as the grand finale.
The boys build tree-houses for themselves and Candace; Dr. Doofenshmirtz plans to use brainwashed pigeons to destroy a celebration in honor of his brother.
The boys set out on a high-seas adventure after learning from their grandpa about a mysterious pirate, Badbeard; Candace spies Perry and Dr. Doofenshmirtz up to their old tricks after getting infected by a psychedelic moss.
23(17A) "Greece Lightning" April 19, 2008 N/A 117a
The boys stage a chariot race through Danville's streets after learning about ancient Greece; Perry finds his latest enemy to be man—not Doofenshmirtz, but one of his creations: a giant robotic mild-mannered businessman named Norm.
24(17B) "Leave the Busting to Us!" April 19, 2008 N/A 117b
Candace uses a reality show to secretly film her brothers designing a white-water rafting ride; Doofenshmirtz tries to create a new ice age via weather pellets.
25 (11A) "Mom's Birthday" May 10, 2008 N/A 111a
Candace plans a special birthday party for Mom, and even a song, but Phineas and Ferb are always getting in the way of what she planned. Later in the show, though, they let Candace take the best part of all at Mom's party. Doofenshmirtz creates a shrinking machine that will make whatever he hates (pelicans, instruments that start with the letter 'B', blinking traffic arrows, etc.) shrink to the size of an atom.
26(18A) "Crack That Whip" May 24, 2008 N/A 118a
The boys build a roller-derby rink for their grandma, who once was on a championship derby team, so she can skate against her onetime rival, Jeremy's grandma; Doofenshmirtz believes a statue of a bearded Rutherford B. Hayes is mocking him because he can't grow facial hair.
27(18B) "The Best Lazy Day Ever" May 24, 2008 N/A 118b
The boys decide to spend the day doing absolutely nothing, but Candace doesn't believe them and ends up constructing something of her own to try to bust them. Meanwhile, after being considered one of the ugliest people in the region, Doofenshmirtz plans to use an "Uglyinator" to make everyone uglier than him so he'd be the most handsome person in the area.
28(19A) "Boyfriend from 27,000 B.C." June 7, 2008 N/A 119a
Phineas and Ferb revive a caveman from a glacier, but the caveman gets loose into a costume party Candace is attending, who thinks the caveman is Jeremy. Meanwhile, Dr. Doofenshmirtz plans to destroy all people dressed as sandwiches.
When Buford's goldfish, Biff, goes missing, the boys help him find it. Meanwhile, Dr. Doofenshmirtz tries to re-gain his evil reputation after accidentally saving a kitten who fell from a tree.
30(10A) "A Hard Day's Knight" June 14, 2008 N/A 110a
Phineas, Ferb and Candace visit their grandparents in England and the boys create a renaissance fair, where Candace ends up in a jousting tournament. Meanwhile, Perry goes undercover at an evil scientists' convention to track down Dr. Doofenshmirtz.
31(21A) "Traffic Cam Caper" July 12, 2008 N/A 121a
Candace acquires footage from a traffic camera showing proof of her brothers' antics. But Perry, using Dr. Doofenshmirtz's robot Norm, steals it for himself so it can be destroyed since it contains evidence he is a secret agent.
32(21A) "Bowl-R-Rama-Drama" July 12, 2008 N/A 121b
The boys build the world's largest bowling ball and pins to try to beat the world record and get into "The World's Most Pointless Records", but after Candace accidentally disables an internal gyroscope, she loses control and rolls around through downtown Danville. Meanwhile, Doofenshmirtz tries to use giant penguins to freeze Danville so he can sell hot chocolate for a million dollars a cup.
33(25A) "Got Game?" August 2, 2008 N/A 125a
Phineas and Ferb create a sports competition that pits boys against girls to see which are the better athletes. Doofenshmirtz tries to win a dog show.
34(25B) "Comet Kermilian" August 2, 2008 N/A 125b
Phineas and Ferb build an observatory and plan to etch their faces in a comet; Candace is physically tormented by Jeremy's sister Suzy while on an outing with him; Doofenshmirtz buys all the steaks in the city so he can mass-market glasses made from them.
35(20A) "Put That Putter Away" August 10, 2008 N/A 120a
When the town's only miniature golf course is closed, Phineas and Ferb build a giant miniature golf course. Candace gets sick so Stacey decides to bust the boys. Meanwhile, Doofenshmirtz moves into a house on the same street as the Flynn-Fletcher house.
After watching an old sci-fi film, Phineas and Ferb decide to build a molecular transporter, which switches the minds of Perry and Candace into each other's body after they accidentally go in together. However, Candace is forced to spent most of the day as a platypus as Perry (in Candace's body) goes on a mission to foil Doofenshmirtz's newest scheme; to replace the Mr. Slushy Burger jingle in the statues of mascot "Slushy the Clown" with his own evil jingles.
'Note'When Candance was a platypus, it showed she was sweating milk. In fact, female platypus' sweat milk. Only females do this. That is why you don't see Perry sweating milk.''
37(15A) "Ready for the Bettys" September 12, 2008 N/A 115a
Candace and her friend, Stacy travel on a tour bus with the Bettys, but later realize they're only being used as servants. Meanwhile, the boys accidentally discover Perry's lair and are sent onto a mission intended for him.
Note: This episode was known as "Secret Agent" and ran on February 16, 2008.
38(15B) "The Flying Fishmonger" September 12, 2008 N/A 115b
The boys help Ferb's grandfather live his life long dream--to jump a gorge in his motorcycle, the Holy Mackerel. Doofenshmirtz tries to kick sand all over his bully's house.
39(9a and b) "One Good Scare Ought to Do It!" October 3, 2008 N/A 109
Isabella has the hiccups and Phineas and Ferb build a haunted house to scare them away. Candace goes over to Jeremy's house, but is interrupted by his little, criminally-insane sister Suzy. Dr. Doofenshmirtz tries to help his mentor by destroying his lab.
The boys learn about one of Ferb's Victorian ancestors, Ferbgor and Dr. Phineastein, who once created a giant platypus monster for a "Monster Ball". Meanwhile while locked in his lab, Doofenshmirtz tells Perry a loosely connected story about his ancestor Dr. Jekyll Doofenshmirtz, and his failed attempts to make a potion that could turn himself into a monster.
Phineas and Ferb help their friend Django display his artwork; Doofenshmirtz tries to impress his former Evil Science professor.
Phineas and Ferb create a superhero cartoon with exaggerated versions of themselves and their friends, while Dr. Doofenshmirtz creates a ray gun that makes people dance.
Note: This episode aired a day before its actual airing date in the UK as part of the new episodes of Phineas and Ferb along with "Hail Doofania!".
In an unusuall role-reversal plot, Dr. Doofenshmirtz builds his own country on a giant inner tube and Vanessa tries to bust him. Meanwhile Phineas and Ferb create a rainbow just for Isabella. Candace and Vanessa accidentally switch clothes at the dry cleaners.
Note: This episode aired a day before its actual airdate in the UK as part of the new episodes of Phineas and Ferb along with Out Of Toon.
4 (24a and b) "Out to Launch" December 5, 2008 N/A 124
Lawrence buys a star for both Phineas and Ferb and Candace online, leading the boys to build a rocket to visit it. Meanwhile, Dr. Doofenshmirtz uses a space station robot to perform a shadow puppet show on the Moon to get back at a former classmate — who himself was a poor puppeteer with "huge hands", but still won over a girl who had been interested in Doofenshmirtz.
Note: The episode aired in Australia as the unaired episode from Spot The Diff.
45 (16a and b) "Phineas and Ferb Get Busted" March 13, 2009 February 16, 2009 116
Within a dream of Perry, Candace sees a dream that she finally busts Phineas and Ferb, leading them to be sent to a militaristic reform school. When Candace realizes what they're doing to her brothers, she teams up with Jeremy to help set them free.
46 (23A) "Unfair Science Fair" March 20, 2009 February 17, 2009 123a
When Baljeet enters the science fair with a design for a portal to Mars, Phineas and Ferb help him build it to scale so he can get his all important grade. Meanwhile, Dr. Doofenshmirtz tries to win first prize at the fair with a baking soda volcano, and Candace competes with a girl for a job at Mr. Slushy Dawg.
47 (23A) "Unfair Science Fair Redux (Another Story)" March 20, 2009 February 18, 2009 123b
Phineas and Ferb try to rescue Candace from Mars, who thinks that nobody, not even her friends want to talk to her. Meanhwile, Perry helps Dr. Doofenshmirtz shop for supplies for his baking soda volcano that he believes will make him win the science fair.
Note: This episode aired on September 11, 2008 on Disney Channel Latinoamerica.
Season 2: 2009–2010
48 (1a and b) "The Lake Nose Monster" March 27, 2009 February 19, 2009 201
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.
Title Reference: The Loch Ness Monster
50 (2a) "Interview with a Platypus" May 7, 2009 February 20, 2009 202a
Phineas and Ferb build a translator to see if Perry's chattering noises actually mean anything, but discover it can work on other animals too. Meanwhile, Doofenshmirtz tries to flood the Tri-State Area so he can make it just like Venice, and to force everyone to buy his new Buoyancy Operated Aquatic Transport, or BO-AT for short.
Title Reference: Interview With a Vampire
49 (2b) "Tip of the Day" May 7, 2009 February 20, 2009 202b
Phineas and Ferb learn what the word "aglet" means and try to spread awareness of this to the world, while Candace uses the campaign as an opportunity to become famous. Meanwhile, Doofenshmirtz tries to get an embarrassing video of himself skating into a toilet off the internet by erasing the world's memory of its existence.
Note: This episode originally ran on January 23, 2009, on Toon Disney.
51 (3a) "Attack of the 50 Foot Sister" May 1, 2009 February 21, 2009 203a
Candace drinks a growth elixir Phineas and Ferb created to become tall enough to audition for a modeling career at a local festival, but becomes extremely large as a result. Meanwhile, Doofenshmirtz plots to cover the festival with the smell of dirty diapers.
52 (3b) "Backyard Aquarium" May 1, 2009 February 21, 2009 203b
Phineas and Ferb build a giant aquarium in their backyard for their new goldfish. Meanwhile, Candace awaits a phone call from her boyfriend Jeremy, and Doofenshmirtz plots to disrupt the hot dog vendors of Danville so he can force them to sell bratwurst.
The boys are inspired to make gelatin in their pool after Candace tells them to do something with their dessert. But, when Dr. Doofenshmirtz demonstrates his newest invention, the "Turn Everything Evil-inator", it literally brings the gelatin to life.
The family and Stacy visit London, where Stacy and Candace investigate the boys' newest scheme like how Sherlock Holmes would. Meanwhile, Perry collaborates with a British spy, Double 0-0 or 00 0, to foil Dr. Doofenshmirtz's plan to move Big Ben to Danville as an alternative to reading his tiny watch. Double 00 is probally a reference to James Bond and not a reference to his enemy, Double 00.
Candace tries to figure out where all of Phineas and Ferb's always creations 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. Meanwhile, Doofenshmirtz goes on a date at the restaurant with a woman also interested in evil, but threatens to use a satellite to eliminate all love in the Tri-State Area if it doesn't go well.
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. 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 accidentally zapped into the game, Phineas and Ferb have to bring her back in time for her cotillion. Meanwhile, Doofenshmirtz creates a device that can put ball gowns onto people to make them girlier (which would make him manlier by comparison)
59 (7a and b) "The Chronicles of Meap" June 19, 2009 April 18, 2009 207
When the boys 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. But when Phineas, Ferb and Isabella are captured by Mitch, a rogue alien bounty hunter trying to capture the "cute" creature, Candace and Meap are forced to help rescue them. Meanwhile, when Dr. Doofenshmirtz tries to retrieve a balloon he had treated as a friend in his childhood using static electricity, he and Perry are launched into the crossfire of the battle with Mitch. Guest stars: David Mitchell[disambiguation needed] as Mitch
Title Reference: The Chronicles of Narnia
60 (8a) "Thaddeus and Thor" July 3, 2009 June 15, 2009 208a
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, Dr. Doofenshmirtz tries to win a game of kickball with a robotic kicking leg.
61 (8b) "De Plane! De Plane!" July 3, 2009 June 15, 2009 208b
Phineas and Ferb build a passenger plane out of papier-mâché to rival the famous Spruce Goose. Meanwhile, Candace and Stacy visit a pool party at Jeremy's house, and Doofenshmirtz builds an evaporation machine out of recycled materials.
62 (9a) "Let's Take a Quiz" July 10, 2009 June 22, 2009 209a
When Candace learns Jeremy is going to appear in a television commercial, she decides to compete against Buford in a game show Phineas and Ferb are producing. Meanwhile, Doofenshmirtz plots to melt local television station towers to curb an addiction to ordering products from infomercials.
63 (9b) "At the Car Wash" July 10, 2009 June 22, 2009 209b
Phineas and Ferb help Isabella and the Fireside Girls meet their fundraising goals by building the world’s most elaborate automatic car wash; Doofenshmirtz tries to literally make mountains out of molehills.
64 (10a) "Oh, There You Are, Perry" July 24, 2009 July 11, 2009 210a
When Perry is re-assigned to a new villain after Dr. Doofenshmirtz is downgraded to a low-level threat, the boys believe Perry has gone missing and try to get him back. Meanwhile, after learning of the downgrade, Dr. Doofenshmirtz tries to use an internship with the new villain to help Perry defeat him. Candace blames herself for Perry's disappearance because she kicked him out of the house after tripping on him.
65 (10b) "Swiss Family Phineas" July 24, 2009 July 11, 2009 210b
After becoming marooned on an island after a storm, Phineas and Ferb build an elaborate island tree house as a shelter. Meanwhile in a inactive volcano on the island, Dr. Doofenshmirtz enslaves monkeys to help him start a laundry cleaning business so he can eventually replace all the laundromats in the Tri-State Area with a franchise of "Evilology" institutes.
Title Reference: Swiss Family Robinson
66 (13a) "Hide and Seek" July 31, 2009 July 18, 2009 213a
Candace tries to bust her brothers when, 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.
67 (13b) "That Sinking Feeling" July 31, 2009 July 18, 2009 213b
Baljeet wants to impress his childhood friend from India, so he enlists Phineas and Ferb to help woo her. However, none of their over-the-top romantic gestures impress her, as she likes Baljeet for who he really is. Meanwhile, Perry must stop the sleep deprived Dr. Doofenshmirtz from moving the Danville Lighthouse to the other side of town so that he isn't bothered by all the ships.
68 (14a) "The Baljeatles" August 7, 2009 July 25, 2009 214a
Baljeet enlists the help of Phineas and Ferb to create a song to perform at a summer camp concert, Candace sets Stacy up with Coltrane, Doofenshmirtz plots to create an army of babies by broadcasting his heartbeat across the city on a speaker.
Title Reference: The Beatles
69 (14b) "Vanessassary Roughness" August 7, 2009 July 25, 2009 214b
Dr. Doofenshmirtz gives his daughter Vanessa an assignment to retrieve a container at a mall containing a rare element for him to prove she is responsible enough to have her own car, but Perry (who is trying to get it away from Dr. Doofenshmirtz), Baljeet (who wants to use it in a science project), and Candace (who thinks the item is a lantern she can give to Jeremy) are also trying to get the capsule.
Title Reference: Necessary Roughness
70 (15a) "No More Bunny Business" August 14, 2009 August 1, 2009 215a
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, who Perry is trying to prevent from hacking into the Agency'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, Dr. Doofenshmirtz appoints a potted plant as his nemesis.
Title Reference: No More Monkey Business
71 (15b) "Spa Day" August 14, 2009 August 1, 2009 215b
Candace and Stacy become sidetracked from a scheduled spa appointment after going to a volunteer house building project simply because Jeremy was there, so the two get their service from a spa built by Phineas and Ferb. Meanwhile, a stray cat Dr. Doofenshmirtz takes in as a pet causes chaos at his lab.
72 (12a and b) "Phineas and Ferb's Quantum Boogaloo" September 25, 2009 September 21, 2009 212
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. But when her actions cause a chain reaction turning the future into a dystopian society led by Dr. Doofenshmirtz, the future Candace decides to enlist her present brothers to help restore the good future.
73 (11) "Phineas and Ferb's Musical Cliptastic Countdown" October 16, 2009 October 12, 2009 211
Major Monogram and Dr. Doofenshmirtz present a viewer-voted countdown of songs from season 1, while Doofenshmirtz himself plots to take over the world with a song that is scientifically engineered to permanently become stuck in the mind.
74 (16a) "Bubble Boys" October 30, 2009 October 3, 2009 (UK) 216a
When Phineas and Ferb create the largest and most durable bubble ever, them, the Fireside Girls, Buford and Baljeet get trapped inside it flying around the city. Meanwhile, Candace practices driving, and Dr. Doofenshmirtz uses a voice-altering cowboy hat to help him spread propaganda through country music.
Note: This episode premiered on Disney XD, in the UK, on October 3, 2009.
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 amusement park. Meanwhile, Pinky the Chihuahua's nemesis Professor Poofenplotz tries to steal a supply of her favorite, but discontinued hair spray.
Title Reference: Indiana Jones and the Temple of Doom
76 (17a) "Cheer Up, Candace" November 13, 2009 October 24, 2009 217a
After feeling depressed when Jeremy cancels his date, Phineas and Ferb try to cheer Candace up. Meanwhile, Dr. Doofenshmirtz frames Perry the Platypus for a series of crimes by using clones of him.
Note: This episode premiered on Disney XD, in the UK, on October 10, 2009.
77 (17b) "Fireside Girl Jamboree" November 13, 2009 October 24, 2009 217b
Candace tries to get 50 patches in one day to join the Fireside Girls so she can get tickets to see a Paisley Sideburn Brothers performance at their jamboree. Meanwhile Dr. Doofenshmirtz tries to halt Fireside Girls cupcake sales by using a device that can turn metal into broccoli.
Note: This episode premiered on Disney XD, in the UK, on October 10, 2009.
78 (18a) "The Bully Code" November 27, 2009 October 31, 2009 218a
Buford vows to become Baljeat's slave after he saves him from choking on a hot dog by eating four at once. Meanwhile, Candace tries to prevent Jeremy from seeing embarrassing photos she accidentally sent to his phone, and Dr. Doofenshmirtz tries to get back at an ice cream truck driver who drove over one of his feet.
79 (18b) "Finding Mary McGuffin" November 27, 2009 October 31, 2009 218b
When Lawrence accidentally sells Candace's Little Mary McGuffin doll to Dr. Doofenshmirtz as a gift for his daughter Vanessa, Phineas and Ferb try and investigate it like movie detectives. Meanwhile, Dr. Doofenshmirtz tries to retrieve an working on-off switch for his newest device.
When Phineas and Ferb create a teleporter that can retrieve objects from anywhere by scanning in photographs, Candace tries to expose it to Linda by teleporting her back from a Mexican-Jewish cultural festival. Meanwhile, Dr. Doofenshmirtz tries to rid the world of mimes by trapping them in actual invisible boxes.
Unsure of his own dancing skills when he agrees to with Candace on the popular television show "Let's All Dance Until We're Sick," the boys develop an exoskeleton allowing Jeremy's movements to be controlled by Ferb. Meanwhile, Dr. Doofenshmirtz and his organization of other mad scientists try to get an evil message broadcast on the show.
When one of Doofenshmirtz's inventions lands in their front yard, Phineas and Ferb try to figure out what it does. Meanwhile, Dr. Doofenshmirtz reminisces about a date he had with Linda Flynn.
On a trip to the beach, 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 turn plants evil.
84 (22a, b and c) "Phineas and Ferb Christmas Vacation" December 11, 2009 December 6, 2009 222
After Phineas, Ferb and thier friends help decorate the city to celebrate the arrival of Santa Claus, Dr. Doofenshmirtz, after finally finding a reason to hate Christmas, uses his Naughty-inator to try and ruin the holiday for everyone. As a result, the boys and their friends try to help save Christmas for Danville.
When Phineas and Ferb create an orb that allows its user to pass through objects to help find Linda's guitar pick, Candace attempts to bust her brothers with it. Meanwhile, Dr. Doofenshmirtz tries to destroy a statue honoring his brother Roger.
When Phineas and Ferb offer to host Aunt Tiana and Uncle Bob’s wedding in the Flynn-Fletcher's backyard, Candace tries to prevent the boys from messing up the wedding and stealing attention away from her role as maid of honor. Meanwhile, Dr. Doofenshmirtz builds a device to turn all healthy foods in the city into junk food, believing that overweight people would be easier to enslave.
87 (21a) "I Was a Middle Aged Robot" February 26, 2010 February 13, 2010 221b
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 "Eulg," an opposite of glue which breaks stuff apart rather than joining it together.
Title Reference: I was a Teenaged robot
Candace and Suzy try to get Phineas and Ferb to bust themselves whilst they build a replica of Niagara Falls so they can ride a barrel over it. Meanwhile, Dr. Doofenshmirtz builds a giant foot out of carbon paper believing that it'll increase his carbon footprint.
Title Reference: Most likely Suddenly Salad
89 (23a) "Undercover Carl" March 5, 2010 February 13, 2010 223a
When the boys build an Anti-Gravity Fun Launcher, Carl accidentally discovers their plans on the internet and presumes they are working for Dr. Doofenshmirtz, so he is sent undercover to figure out what they are doing. Meanwhile, Doofenshmirtz intercepts the plans himself and attempts to find a use for it, and Perry is sent on a literal wild goose chase to retrieve a lost agent.
Title Reference: Undercover Boss
90 (23b) "Hip Hip Parade" March 5, 2010 February 13, 2010 223b
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. Meanwhile, Dr. Doofenshmirtz tries to create traffic jams with a duplication device.
91 (25a) "Invasion of the Ferb Snatchers" April 16, 2010  February 20, 2010 225a
After watching a sci-fi movie marathon, Candace becomes convinced that Ferb is an alien. Meanwhile, Dr. Doofenshmirtz plans to auction off an old invention, the Wrapped-Up-In-A-Nice-Little-Bow-Inator (which compresses objects into small wrapped boxes) by marketing it as a cleaning device. Note: This episode aired in the UK on Disney XD (UK & Ireland) in 15 April 2010.
Title Reference: Invasion of the Body Snatchers
92 (25b) "Ain't No Kiddie Ride" April 16, 2010  February 20, 2010 225b
When the boys trick out the kiddie rides at a store, Candace is sent across Danville on a rocket ride after trying to keep it from moving so she can bust them. Meanwhile, Dr. Doofenshmirtz tries to burn his name into the atmosphere to maintain his legacy.
Note: This episode aired in the UK on Disney XD (UK & Ireland) on 15 April 2010.
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.
95 (29a) "The Lizard Whisperer" June 11, 2010 March 6, 2010 229a
When a new pet lizard they discover grows to a gigantic size due to the effects of one of Doofenshmirtz's inventions, Phineas and Ferb try to get him back. Meanwhile, Doofenshmirtz learns a song from Jeremy so he can use it to summon an alien army with his Every-Directional-Amplifinator Gigantinator
96 (29b) "Robot Rodeo" June 11, 2010 March 6, 2010 229b
Phineas and Ferb hold a rodeo in the backyard with robotic bulls, Candace tries to keep focused, Dr. Doofenshmirtz competes against members of L.O.V.E.M.U.F.F.I.N. and others in an Inator Creator competition.
Phineas and Ferb take on a heroic alter-ego as "The Beak" when unexpectedly becoming superheroes with an indestructible suit they built for an extreme skate track. But, when the villain Khaka Peü Peü discovers them, he tries to terrorize the city, and only The Beak can stop him. Meanwhile, Dr. Doofenshmirtz is temporarily given the mayoral post by his brother Roger to prevent him from being blamed for Khaka Peü Peü's presence.
Guest stars: Ben Stiller as Khaka Peü Peü and Christine Taylor as Khaka Peü Peü's nagging wife
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.
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.
TBA (26a and b) "Wizard of Odd" TBA TBA 226
Mom says that Phineas and Ferb have to clean the house and she asks Candace to help, but she refused and instead read the book Mom gave her: The Wizard of Oz. Phineas and Ferb have to spin the house and spray it with a hose, but they spin the house too fast and accidentally knock Candace out, sending her into a Wizard of Oz-esque dream world. At first she finds Perry lying on her and finds out her house has landed in the other world. She journeys to "Bustopolis" to bust her brothers, but soon discovers that evil forces are attempting to get the boots that have grown on her feet.
Note: This episode aired on April 9, 2010 in Disney Channel Australia. A Wizard of Oz parody. Also called "The Wizard of Odd".
TBA (30a) "The Secret of Success" TBA TBA 230a
Phineas and Ferb build an all-terrain vehicle and travel on several surfaces. Doof holds a evil marathon. Meanwhile Baljeet, Stacy and Candace are at a convention.
Note: This episode premiered in Germany on June 4, 2010 on Disney XD.
TBA (30b) "The Doof Side of The Moon" TBA TBA 230b