1La montaña rusa
Phineas y Ferb construyen una montaña rusa desde su patio trasero hasta toda la ciudad para ellos y los niños del vecindario. Mientras tanto, Perry el Ornitorrinco intenta frustrar el malvado plan del Dr. Doofenshmirtz de revertir la rotación de la Tierra.
2Terror y nomos en una fiesta en la playa
Phineas y Ferb construyen una enorme playa paradisíaca en su patio trasero en el día más caluroso del año. Mientras tanto, el Agente P intenta evitar que el Dr. Doofenshmirtz robe todos los gnomos de césped en el área de los tres estados en venganza por tener que vestirse como tal en su juventud.
3Superestrellas
Candace prueba para La próxima estrella súper estadounidense del ídolo pop adolescente, pero Phineas y Ferb toman otro camino hacia el estrellato. Mientras tanto, Perry el Ornitorrinco intenta evitar que el malvado Dr. Doofenshmirtz se apodere del Área de los Tres Estados con un robot gigante con forma de edificio
4El rápido y Phineas
Inspirados por una carrera a lo lejos, Phineas y Ferb transforman el auto de mamá en un auto de carreras y lo presentan en la Swamp Oil 500. Candace intenta acabar con ellos sorprendiendo a Linda con lo que están haciendo, pero sigue fracasando. En otra parte, el Dr. Doofenshmirtz intenta desinflar todo lo que hay en el área de los tres estados desde su dirigible.
5¡ luces, Candace, acción!
Phineas y Ferb dirigen una adaptación cinematográfica de la obra favorita de Candace, pero transforman esta hermosa obra en una película completa de monstruos. Mientras tanto, Perry el Ornitorrinco intenta averiguar por qué el Dr. Doofenshmirtz está tan callado.
6Bravucón salvaje
Buford desafía a Phineas a una competencia de lucha de pulgares. Phineas recibe entrenamiento de la estrella invitada Evander Holyfield. Mientras tanto, el Dr. Doofenshmirtz inventa al Esclavista para que la gente asista a su cumpleaños y limpie después.
7Candace pierde la cabeza
Phineas y Ferb remodelan el Monte Rushmore para el cumpleaños número 15 de Candace, mientras el Agente P impide que el Dr. Doofenshmirtz construya un túnel hacia China
8Yo, Brobot
Phineas y Ferb construyen versiones robóticas de ellos mismos, Phinedroids y Ferbots, para ayudar con sus Grandes Ideas. Mientras tanto, el Dr. Doofenshmirtz intenta eliminar todos los mensajes que dejó en el contestador automático de su novia.
9Pista de escape
Phineas y Ferb se unen a la pasarela de Gaston Le Mode y sus outfits se convierten en la última tendencia de moda. Al mismo tiempo, Candace intenta convertirse en la nueva modelo de moda. Mientras tanto, el Dr. Doofenshmirtz crea clones de sí mismo para que puedan esperar en la fila por él.
10Los pocos magníficos
Una visita a un rancho turístico se convierte en un arreo de ganado por la ciudad para Phineas, Ferb e Isabella. Mientras tanto, el Dr. Doofenshmirtz inicia un negocio de revestimientos de aluminio fabricando el casco de control de termitas para controlar las termitas.
11S'Winter
Phineas y Ferb utilizan una máquina de cono de nieve para crear S'Winter, una amalgama de invierno y verano. Mientras tanto, Candace sigue a Jeremy después de notarlo saliendo con lo que parece una chica. Por otra parte, el Dr. Doofenshmirtz planea derretir todo el chocolate en el área de los tres estados con su Melt-inator 65000.
12El cirque de Phineas y Ferb
Los chicos crean un circo para el vecindario después de que se cancelan sus planes circenses originales, mientras Jeremy le da a Candace chirivías salvajes a las que ella es alérgica. Doofenshmirtz crea un dispositivo para elevar la voz de las personas para que su propia voz parezca más baja.
13¿Eres mi mamá?
Mientras ven una película de momias con su padre, Phineas y Ferb deciden ir en busca de una momia real. Mientras tanto, el Dr. Doofenshmirtz intenta crear una propiedad frente a la playa.
14Listos para las Bettys
Candace y Stacy viajan con su banda favorita sólo para descubrir que son verdaderos snobs. Mientras tanto, Phineas y Ferb se convierten en agentes secretos durante un día después de encontrar una de las entradas secretas de la guarida de Perry. Ahora Perry tiene que proteger a los chicos sin que ellos se den cuenta, mientras intenta detener a Doofenshmirtz.
15La máquina de helados
Phineas y Ferb intentan fabricar una máquina de helados gigantes para Isabella pero las cosas no salen como planeaban. Mientras, Vanessa quiere demostrarle a su madre que su padre es malo, pero tiene que hacerse con unos importantes planos.
16Juguete para el mundo
Los chicos crean una versión de madera de Perry y la venden a una compañía de juguetes. El doctor Doofenshmirtz construye una gran muralla alrededor de la ciudad para cobrar peaje.
17Quita a Pie Grande de mi vista
Los chicos asustan a Candace con un Pie Grande de mentira.
18It's a Mud, Mud, Mud, Mud World
Phineas and Ferb create a monster truck for Candace to practice driving while Dr. Doofenshmirtz tries to find investors for his line of monster trucks that are actual monsters, with a trump card to take down the competition.
19Mom's Birthday
Candace plans a special birthday for Mom, and even a song, but Phineas and Ferb are always getting in her way of what she planned, unintentionally topping everything. Meanwhile, Doofenshmirtz creates a shrinking machine that will make whatever he hates implode.
20Journey to the Center of Candace
When the boys build a shrinking submarine to retrieve Isabella's sash from Pinky's stomach, they end up in the wrong place.
21It's About Time!
Phineas and Ferb find a time machine at a museum and travel back to the Jurassic Age. Meanwhile, Perry is sad when Doofenshmirtz replaces him with a new nemesis, Peter the Panda, so he confides in a relationship talk-show host.
22Dude, We're Getting the Band Back Together
The boys and Candace hatch a plot to reunite their mom and dad's favorite band for a wedding anniversary concert.
23Tree to Get Ready
Phineas and Ferb build super tree houses for themselves and Candace, but things get a little out of hand when a treehouse fight instigates. Meanwhile, Dr. Doofenshmirtz plans to ruin a ceremony in his brother's honor.
24The Ballad of Badbeard
The boys set out on a high-seas adventure after learning about a mysterious pirate from their grandpa. Meanwhile, Candace spies Perry and Dr. Doofenschmirtz up to their old tricks, but is it all in her head?
25Greece Lightning
The boys stage a chariot race through the town's streets after learning about ancient Greece. Meanwhile, Dr. Doofenshmritz creates a giant robot named Norm to destroy Perry, once and for all.
26Leave the Busting to Us
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.
27Crack That Whip
Phineas and Ferb set up a roller derby rink for Grandma Betty Jo.
28The Best Lazy Day Ever
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. Meanwhile, Dr. Doofenshmirtz is tired of being the ugliest person around, so he invents a device that can turn anything and anyone ugly.
29Boyfriend From 27,000 B.C.
While on an archaeological dig, the boys discover a caveman who falls in love with Candace, who is dressed as a cave girl for costume party. Then, Phineas and Ferb assist Buford in locating his missing goldfish.
30Voyage to the Bottom of Buford
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.
31A Hard Day's Knight
Phineas, Ferb, and Candace go to a Renaissance festival and Phineas and Ferb get Candace to go into a jousting tournament.
32Traffic Cam Caper
Perry wants to destroy footage from a traffic camera to keep his identity a secret, as Candace tries to use the film in hopes of proving her brothers create unusual stuff. Then, the guys decide to build the largest bowling ball and pins in the world, while Doofenshmirtz wants to rid the world of rainbows.
33Bowl-R-Rama Drama
Phineas and Ferb build the world's largest bowling ball and pins. Meanwhile, Doofenshmirtz wants to use his latest invention to freeze the Tri-State Area so the people will buy his hot chocolate.
34Got Game?
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.
35Comet Kermilian
The boys build a telescope, while Doofenshmirtz tries to liquify steak. Meanwhile, Candace has another encounter with Jeremy's younger sister, Suzy.
36Put That Putter Away
Phineas and Ferb create the world's largest golf course, and since Candace is sick, she asks her best friend Stacey to bust the boys for her.
37Does This Duckbill Make Me Look Fat?
Phineas and Ferb create a teleporting machine, but it ends up switching Candace and Perry's brains.
38The Flying Fishmonger
The boys are helping Ferb's grandfather live his life long dream - to jump a gorge in his motorcycle, the Holy Mackerel. Meanwhile, Perry sets out to stop Dr. Doofenshmirtz from exacting another petty revenge that dates all the way back to the sandbox.
39One Good Scare Ought to Do It!
When Isabella falls prey to hiccups, Phineas and Ferb gather the kids together to help scare them out of her, using a remote controlled haunted house. Meanwhile, Doofenshmirtz sets out to destroy his mentor's hideout, so that no one could discover his secrets, but not if Perry has something to say about it!
40The Monster of Phineas-n-Ferbenstein
The boys learn about one of Ferb's Victorian ancestors, who helped a scientist create a monster. Meanwhile, Doofenshmirtz recalls the story of his great-great-grandfather Dr. Jekyll Doofenshmirtz.
41Oil on Candace
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.
42Out of Toon
The boys create a cartoon and cast themselves as superheroes and Candace as the villain, while Perry attempts to defeat Doofenshmirtz, who has taken control of the power of dance.
43Hail Doofania!
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.
44Out to Launch
The boys build a rocket ship to get a good look at a star named for them, and Candace accidentally takes a ride with them just as she is trying to find the courage to ask Jeremy to a dance, while Isabella tries her best to do the same with Phineas. Meanwhile, Perry must stop Dr. Doofenshmirtz, who, not only is conveniently in space too, but has created a massive spacestation in an attempt to get revenge on "Huge-Hands-Hans".
45Phineas and Ferb Get Busted
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.
46Unfair Science Fair
Phineas and Ferb help Baljeet build a portal to Mars for a special Summer science fair. Candace competes against another girl for getting a job at Mr. Slushy Burger. Meanwhile, Doofenshmitz builds a bicarbonate volcano for the science fair, in yet another attempt to redeem himself from his embarrassing childhood, where we discover where the -inator suffix originated from.
47Unfair Science Fair Redux (Another Story)
When Candace believes that no one wants to be around her anymore, she quickly steps through Baljeet's portal to Mars, where she is quickly heralded among the martians. Meanwhile, Perry accompanies Dr. Doofenshmirtz to help build his evil contraption for him to stop faster, with slightly less than pleasing results.