The Phineas and Ferb Effect

The gang from Milo Murphy's Law meet the gang from Phineas and Ferb and try to stop sentient pistachio trees from taking over the world.

Songs

 * Chop Away at My Heart
 * Quirky Worky Song
 * Pressure
 * How Do I Do It

I know what we're gonna do today
None.

Hey, where's Perry?
None.

Perry's entrance to his lair
None.

Evil Jingle
Doofenshmirtz Evil Incorporated!

Professor Time Building: Recently Renamed for Branding Purposes

The Llama Incident
None.

Background Information

 * First announced at San Diego Comic-Con 2017, and confirmed by The Hollywood Reporter.
 * There have been many Phineas and Ferb Easter eggs in Milo Murphy's Law to lead up to this crossover.
 * This is the first episode of the second season of Milo Murphy's Law.
 * It is revealed that Baljeet and Buford are fans of The Lumberzacks, and that Baljeet carries their CD with him all the time.
 * Isabella has only two lines in the entire crossover, which both include her catchphrase.
 * This episode confirms that Doofenshmirtz is Professor Time, that the group was looking for in the Milo Murphy's Law episode "Fungus Among Us".

Production Information

 * Due to Thomas Sangster's schedule conflicts with filming Maze Runner: The Death Cure and other projects such as Thunderbirds Are Go, the role of Ferb was recast in this episode with David Errigo Jr.
 * Unlike Thomas Sangster, Ashley Tisdale was available, but may have not been used in any earlier Milo Murphy's Law episodes because of Skylanders Academy.
 * Candace, Ferb and Buford are the only crossover characters whose actors did not voice new characters in Milo Murphy's Law prior to The Phineas and Ferb Effect, when Phineas, Dr. Doofenshmirtz, Major Monogram, Perry, Baljeet, Isabella, and Irving's actors all voiced original characters in earlier Milo episodes (although Irving himself didn't speak in this crossover).

International Premieres

 * August 10, 2018 (Disney Channel Japan)
 * September 10, 2018 (Disney XD Germany, Poland, Spain)

Errors

 * Doofenshmirtz isn't the first to invent time travel, since Phineas and Ferb fixed the time machine in the museum in the episodes "It's About Time!" and "Phineas and Ferb's Quantum Boogaloo". But Doof probably wasn't aware of that, unless he later went back in time to help Xavier Onassis.
 * When Phineas, Ferb and Milo strap on their seatbelts in the robot, Ferb's larger eye is in front of his smaller one.
 * Doof's building has the sign changed to "Professor Time's Building, Recently renamed for branding purposes" (and is later destroyed). However, in "Act Your Age", which takes place 10 years in the future, Doof's building is still Doofenshmirtz Evil Incorporated, except the word "Evil" has been removed from the sign. However, it is likely that Doofenshmirtz just decided to rename his sign with its old name (minus the word "Evil").
 * This crossover has several inconsistencies with the original Phineas and Ferb continuity:
 * The Phineas and Ferb Effect of everything going right for Phineas and Ferb does not add up with their Sun-Beater getting damaged along the way in "Phineas and Ferb Summer Belongs to You!", getting their rubberization machine broken by Doof-zombies and getting turned into them before Isabella in "Night of the Living Pharmacists", or being sucked through a time rift in "Last Day of Summer" in which the conflicts came from things going wrong for the boys. Additionally, the Phineas and Ferb Effect as a concept ruins any tension that "Last Day of Summer" originally had from Candace's do-overs to bust them.
 * "Candace Loses Her Head" and "The Best Lazy Day Ever" indicate that Phineas and Ferb takes place in 2008, and technology in the show is usually dated back to that time as it goes on. "Battle of the Bands" and "The Llama Incident" indicate that Milo Murphy's Law takes place in 2017, which is after 2015 when The Doctor Zone Files would be at least 50 years old. This could mean that the future storyline of "Act Your Age" may not even exist in Milo Murphy's Law continuity since every Phineas and Ferb character is the same age almost 10 years after 2008 in Milo Murphy's Law.
 * Dr. Doofenshmirtz had other jobs after he gave up evil as Vanessa's science teacher in Doof 101 and The O.W.C.A. Files. In Milo Murphy's Law, when he moves into Milo's house after DEI is destroyed, he appears to be jobless and it is never explained how he may have lost those jobs.

Continuity

 * This episode will be a continuation of the Milo episode "Fungus Among Us".
 * When Doof changes the channel, Katt Karr, Ducky Momo, The Klimpaloon and the Giant Floating Baby Head Hour, Horse in a Bookcase, and Dancing with the Bears from Ferb TV can be seen.
 * Phineas mentions the satellite they built that was in Phineas and Ferb: Mission Marvel.
 * Doof once again mentions Pizzazium Infinionite. (Vanessassary Roughness, Mission Marvel)
 * Doof, Perry, Orton, Dakota and Cavendish end up on the Island of Lost Dakotas.
 * Milo offers Phineas a blowtorch and some peanut butter, a reference to Rollercoaster.
 * Professor Time's time machine looks very similar to the one featured in It's About Time! and Phineas and Ferb's Quantum Boogaloo.

Allusions

 * Batman - When Milo, Agent P and Diogee head back to Milo's house, a transition not unlike the "Bat-transitions" from this 1960s campy TV series appears.
 * The Nutcracker - The music accompanying Milo's rhythmic gymnastics routine is "Dance of the Sugar Plum Fairy" from this Tchaikovsky ballet.
 * Pokémon Go! - Candace plays Ducky Mo-Go, an app that essentially parodies this fad revival augmented reality app.
 * Futurama - One of the pistachions call the humans "meatbags", just like Bender.
 * The Exorcist - Doof says, "The power of orange soda repels you!" three times, a reference to Father Merrin and Father Karras' repeated line "The power of Christ compels you!" from the 1973 film.

Trivia

 * Many Phineas Easter eggs have been sprinkled throughout Milo Murphy's Law to lead up to this episode, cluing to the fact that both Milo and Phineas share the same universe.
 * This will be the third crossover for Phineas and Ferb. ("Phineas and Ferb: Mission Marvel", "Phineas and Ferb: Star Wars")
 * Phineas and Ferb interact with Doofenshmirtz for the third time. ("Phineas and Ferb The Movie: Across the Second Dimension", "Night of the Living Pharmacists")
 * Candace doesn't try to bust the boys once again.
 * Although Dr. Doofenshmirtz gave up evil in Last Day of Summer, it is unclear if Candace has given up trying to bust Phineas and Ferb after that final episode.
 * The Giant Floating Baby Head can be seen as one of the transformed pistachions.
 * Irving, Linda Flynn-Fletcher and Lawrence Fletcher appear but have no speaking lines.
 * Phineas mentions Vanessa when referring to Doof as her dad.
 * When Doof suspects that Diogee works for O.W.C.A., he could be referring to the times he doesn't recognize Perry without his hat.
 * Running gag: Everyone, particularly Buford and Baljeet, seems to think that Zack and Melissa are a couple. (Yeah, but a couple of what?)
 * Running gag: Buford explaining the joke, much to Baljeet's chagrin.
 * Second time Phineas calls Ferb "chatty" after Candace Disconnected.
 * Vincent Martella is credited for playing Bradley and then Phineas, even though Phineas has more lines.
 * It could be a rule that the character from Milo Murphy's Law that a person voices has to be credited before a crossover character from Phineas and Ferb, like Diogee being listed before Perry when Dee Bradley Baker voices both of them.
 * It is hypocritical that Dakota said that Doofenshmirtz's voice is annoying, since they both have the same voice actor, Dan Povenmire, who is also co-creator of both shows.
 * Linda was seen at the end of the episode, which means this could be the first time she's ever seen what the boys have done.
 * Correction: at least the fourth time ("Interview With a Platypus", "The Bully Code", "Backyard Hodge Podge").
 * Ferb breaks the fourth wall when he says "It's just that it's been a long, long time."
 * Third time someone outside of O.W.C.A., Milo Murphy and Diogee, see both sides of Perry's double life without having their memory erased. The first was Candace Flynn in The Ballad of Badbeard, Leave the Busting to Us!, Bowl-R-Ama Drama and The Remains of the Platypus, and the second was Stacy Hirano in Happy Birthday, Isabella.
 * In this case, Heinz Doofenshmirtz and Phineas Flynn are indirectly responsible for blowing Perry's cover to Diogee and Milo (who didn't know either side of Perry) by introducing them to the only side of Perry's double life that they each know, while Candace and Stacy already knew Perry's 4-legged pet identity before seeing him as a 2-legged secret agent.
 * Melissa and Zack also see Perry's 2-legged agent identity in his next Milo Murphy's Law appearance, but have not seen his 4-legged pet identity with Phineas, Candace and Ferb.

Cast

 * Al Yankovic as Milo
 * Sabrina Carpenter as Melissa, Additional Voices
 * Mekai Curtis as Zack
 * Dee Bradley Baker as Diogee, Perry, Additional Voices
 * Jemaine Clement as Orton Mahlson, Additional Voices
 * Vincent Martella as Bradley and Phineas
 * Ashley Tisdale as Candace, Additional Voices
 * Alyson Stoner as Isabella
 * Christian Slater as Elliot
 * David Errigo Jr. as Ferb
 * Pamela Adlon as Brigette Murphy
 * Diedrich Bader as Martin Murphy
 * Kate Micucci as Sara
 * Rhys Darby as King Pistachion
 * Jeff "Swampy" Marsh as Cavendish, Major Monogram, Additional Voices
 * Dan Povenmire as Dakota, Dr. Doofenshmirtz, Additional Voices
 * Maulik Pancholy as Baljeet
 * Bobby Gaylor as Buford
 * Additional voices: Brock Powell, Jeff Bennett