Phineas and Ferb: Season 4

While Phineas and Ferb build a giant tire swing, Buford removes a crucial part, accidentally turning Candace into a fly. Meanwhile, Doofenshmirtz struggles with a serious case of "evil scientist's block" as he tries to devise a new evil scheme. Phineas and Ferb fix up a vintage car for Candace for Danville's Doo Wop Hop car show, while Doofenshmirtz tries to sabotage the event by turning the other cars to dust with his "Rust-inator".

Former National Hockey League star Luc Robitaille offers his assistance when Phineas and Ferb take an ice hockey game to the extreme. Meanwhile, Doofenshmirtz builds an "Abominable-inator" to make himself bigger, scarier and hairier. 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 tries to use a "Resolutio

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. Phineas and Ferb create a new invention using recycled parts from past projects.

Phineas and Ferb create Rutabega-themed vehicles when Candace is chosen to be Rutabega 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. Candace volunteers to help Isabella record her audio book so Phineas and Ferb can continue building their giant, recyclable, rock climbing project as planned, and get busted by their mother. Meanw

After Linda reminisces about old times, Phineas and Ferb make a giant inflatable wading pool. Meanwhile, Candace reveals her "Emo" side, and Doofenshmirtz attempts to become ruler of all bees. Isabella and the Fireside Girls attempt to get their Bee Keeping patch by turning themselves into bees, and Poofenplotz tries to become Queen of the World by stealing and consuming massive amounts of royal jelly. Absent: Candace Flynn

Perry teams up with a human agent named Lyla, to stop a hijacked train running along the U.S./Canada border. In a past mission, they had a falling out, so Perry must decide whether or not he can trust Lyla and her unique sense of logic to get them through the mission, defeat Doofenshmirtz and save the train's passengers and Canada's national treasure – a moose named Albert.

Candace thinks her day will be easy when Phineas and Ferb actually ask her to get Mom if they get stuck in their gigantic reproduction of the Gordian Knot, but when Jeremy stops by and asks for her help to open his personal mini safe, she finds her day getting a little more complicated. Meanwhile, Doofenshmirtz plans to eliminate every all-you-can-eat buffet in the Tri-State Area with his "Eat-It-All-Inator". The gang switches bodies with alien tourists only to realize they were actually duped b

Perry must escape Liam, an Australian platypus hunter who is out to destroy him, rescue Doofenshmirtz from the error of his ways and maintain the sanctity of the Danville Botanical Gardens. Meanwhile, Phineas and Ferb create an "infinite probability generator" that allows Baljeet to make as many choices as he pleases without being affected by the consequences. This proves to be disastrous for Buford as the over 30 Baljeets, each with a grudge, form a mob and begin to terrorize and bully him.

Phineas and Ferb set out to prove the existence of the elusive Chupacabra to the world, but Candace cannot stand the wait and needs to first just prove it to her mother. 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, Ferb, and the gang celebrate Isabella's birthday in a big way, but all she really wants is some quiet time with Phineas. Meanwhile, Do

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 and Ferb create a machine that will amplify Buford's senses to those of a dog's. However, it works so well t

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.

After learning about Monty and Vanessa's secret relationship, Carl blackmails 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 Linda about them. Meanwhile, 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,

When Linda becomes overwhelmed for organizing a block party, she asks Phineas and Ferb for help, much to Candace's dismay. Meanwhile, Norm falls in love with Rodney's female robot. Motivated by a movie with a strong heroine, Candace and Stacy feel empowered to team up against rival groups and compete in Phineas and Ferb's Ultimate Obstacle Course. Across town, Doofenshmirtz plans to humiliate Roger by using his "90 Degree-turn-inator" on him so that he will accidentally insult the Mayor of Stumb

With Stacy's advice, Candace asks Phineas and Ferb to create an oversized book of her special events with Jeremy for his birthday. Also, Perry is after Doofenshmirtz, who stole every horror movie in town to create an -Inator that makes people's greatest fears appear. When Candace is accidentally zapped by Doofenshmirtz's "Stinkelkrampen-inator" (a.k.a. Good Luck-inator), she realizes she has a good chance of busting Phineas and Ferb.

Phineas and Ferb assemble an extreme batting challenge and Candace finds herself in a predicament involving extreme water sports. Meanwhile, Doofenshmirtz builds a "Back-to-the-store-inator." Phineas and Ferb test kites in the park after inventing a wind-amplification device. Linda gives a makeover to the backyard and Candace thinks she will bust the boys. Meanwhile, Doofenshmirtz builds the "Sog-Inator" to take vengeance on a childhood bully who douses him with a bucket of water.

When Phineas and Ferb discover a commemorative coin from the 1903 Danville World's Fair, they are immediately taken back to the festival where steam-driven devices were introduced and a set of kids who were very much like them were preparing for the highly anticipated event. Meanwhile, Sweary the Swan (Perry) must stop Professor Von Doofenshmirtz from destroying the fair. Isabella plans an impromptu picnic for Phineas when the rest of the gang have plans of their own. Meanwhile, Doofenshmirtz us

This episode features three separate tales told by a mysterious bookmobile owner: * Candace accidentally conjures up a spell that brings her Ducky Momo plushie to life and stalks her. * Doofenshmirtz summons a mythological, giant floating baby head that grants cursed wishes. * Phineas, Ferb, and their friends go up against a horde of evil purple platypuses set on destroying the town.

When Vanessa learns that her father has inherited a Drusselsteinian castle right next door to her she seizes the opportunity to throw the biggest Halloween bash ever. The whole town is there, including Phineas and Ferb, who act as the event's party planners and DJs. Meanwhile, Doofenshmirtz enlists Perry to help him find a large, hidden treasure that his Great Aunt has placed somewhere within the castle. After studying hours of horror movies, Doofenshmirtz develops a theory that enlarging small,

Phineas, Ferb, 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.

Doofenshmirtz gets punished with community service for being evil, and he is forced to be a science teacher at Danville High School, much to Vanessa's dismay. Guest stars: J. K. Simmons as Napoleon, Josh Gad as Wendell, Stephen Root as Lloyd, and Gary Cole as Principal Lang Perry helps Doofenshmirtz 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, so she and the Fireside Girls have to grab the letter before Phineas reads it. Meanwhile, Doofenshmirtz invents the "Unretrograde-inator" to help change his misfortune. Candace is accidentally hit by Doofenshmirtz’s "Impersonator-inator", which changes her appearance to a pizza delivery guy, but uses this appearance to help her better understand boys.

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.

Doofenshmirtz helps rogue O.W.C.A. agent Dennis the Bunny escape prison. Meanwhile, Phineas and Ferb make some improvements on the Fireside Girls' marionette show. Doofenshmirtz blasts the favorite to win the Montevillebad Grand Prix with his "I-Don't-Care-inator" so that he has a better chance of winning the race himself. However, he finds himself racing against Perry. Guest stars: Jeremy Clarkson, Richard Hammond, and James May as themselves

Phineas and Ferb try to open a capsule that falls from the sky. Meanwhile, Doofenshmirtz gets kidnapped by an evil scientist named Professor Mystery and learns that Peter the Panda is Professor Mystery's nemesis. Guest star: Terry O'Quinn as Professor Mystery Doofenshmirtz teaches a seminar called "The -Inator Method". Meanwhile, Phineas and Ferb host an interplanetary race while Candace tries to multitask at the same time as playing an MMORPG entitled Ducky Momo's Golden Quest.

Set ten years in the future, a teenaged Phineas is making a decision about which college to attend when he suddenly gets some news about Isabella. Meanwhile, Doofenshmirtz suffers a midlife crisis.

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.

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 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.

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.