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Phineas and Ferb Wiki

So, to recap, I rotate the dark side of the lunar surface towards the Earth, eliminating the full moon, and corner the market on evil!

— Heinz Doofenshmirtz

Phineas and Ferb plan to put Danville on the map by building the world's tallest building. However, Candace teams up with Albert and utilizes his expertise to bust her brothers. Meanwhile, Dr. Doofenshmirtz wants to be responsible for all the evil in the Tri-State Area, and since he believes that evil levels rise during a full moon, he plans to rotate it so that only the infamous "dark side of the moon" faces Earth.

Episode Summary

Phineas and Ferb are watching a TV commercial begging people to come to Danville. Phineas remarks that begging is unbecoming, and that Danville really needs a big tourist attraction. He suddenly knows what they're going to do today.

In another room, Linda tells Candace she is going to make her rounds. Just as Candace says goodbye, large trucks carrying supplies for Phineas and Ferb's new project drive into the backyard. She calls out for her Mom, but Linda's already gone. She quickly decides she needs backup and calls Stacy. Unfortunately, her friend is going to the eye doctor and won't be able to help her.

Candace and Albert meet

Out on the sidewalk, Irving is carrying a box full of spy cameras for Phineas and Ferb and walking with his older brother, Albert. Albert decides he is going to teach Irving self-defense with his nunchucks, but Irving complains that he would much rather see what Phineas and Ferb are doing. Albert takes the box of cameras from him and dumps them on the ground. After he refuses to pick them up, Irving angrily leaves to go play with Phineas and Ferb.

Albert is left alone until Candace walks by, talking on the phone with Jenny. Immediately lovestruck, he hits on her, offering to help her since it's part of his Medieval Knight's Code to help a "damsel in distress". Candace at first blows him off, until he suggests using spy cameras to catch Phineas and Ferb in the act, therefore busting them. Candace realizes she will need a nerd's help to bust her brothers, and Albert gives her his "nerd word" that he will help her.

Meanwhile, Agent P is getting his briefing from Major Monogram. Dr. Doofenshmirtz has been brushing up on his astronomy, and Major Monogram tells him that they don't know what he's planning. He tells Agent P to go to Doofenshmirtz's unrealistically fast. Perry disappears, and four seconds later, arrives at Doofenshmirtz Evil Incorporated. As soon as he arrives, he is trapped in a space helmet. Doofenshmirtz shows him a graph of his evil and explains that in every given month, he is evenly evil, never getting more or less evil, but on the full moon, other evil activity rises and he seems less evil by comparison. He decides to turn the Moon around so the dark side will face the Earth, eliminating the full moon, and freezing all other evil, making him seem more evil by comparison. Perry stares at him like he's an idiot and Doofenshmirtz says an idiot wouldn't build a Lunar-Rotate-Inator, though he accidentally shows a different idea when he pulls away a curtain to show proof, instead revealing a cork with a jellybean taped to it (to which Doofenshmirtz claimed it's a layered idea).

Back with Phineas and Ferb, they, along with Isabella and Irving, are building the world's tallest building, adding many floors to it continuously while Albert and Candace are setting up the spy cameras. Irving looks through a telescope from a part of the building and notices, deciding to disable the cameras.

At the top of the building, which had reached far above Earth, Isabella asks how will they know when they will stop building. Phineas says they'll just know when they get there, just as the building hits the Moon. Ferb decides they're there. On Earth, Candace and Albert are in a van, ready to look through the spy cameras. However, none of the screens seem to be working. They go outside to investigate, at which point Irving calls to Albert from a balcony on the building, and reveals that he has taken all of the cameras. A thoroughly enraged Albert runs into an elevator and goes after him to retrieve the cameras.

The building rotates over Candace and Linda

When he enters the building, he is stunned by the variety of things inside, including a monorail rollercoaster. Irving comes by him on the monorail, chides him for wanting to bust Phineas and Ferb, and speeds away again. Albert chases after him, boarding the same car Phineas and Ferb happen to be on. The two give him a quick tour on the rollercoaster, which thoroughly astounds Albert, and drop him off at the floor where Irving is.

Albert agrees that Phineas and Ferb are geniuses, but it won't stop him from trying to bust them for Candace because he gave her his nerd word. This shocks Irving, who states that he now has only two left. Albert takes the elevator back down and tells Candace that he didn't retrieve the cameras, but that the building is so well built, there is no way that it can disappear before her mother comes home, at which point Candace is overcome with happiness that she has won.

Agent P escapes from the space helmet and runs at Doofenshmirtz, only to trip over the jellybean taped to a cork. Perry then falls flat on his face, much to the amusement of Doofenshmirtz, who confirms that it was a layered idea. Doofenshmirtz then quickly shoots his Inator at the moon, which is connected to Phineas and Ferb's building through the spire at the top that is jammed into it. It begins to rotate, pulling the building up and out of sight just as Linda returns home, once again failing Candace's attempt to bust her brothers.

Doofenshmirtz realizes that even though the moon is rotating, the dark side isn't moving. Agent P backs up and positions the Inator just right so that it gets hit by the bottom of the building as it rotates with the moon. He puts a space helmet on Doofenshmirtz as the evil doctor is caught on the building and is taken up into space, where he eventually realizes the moon reflects light from the sun. Realizing this, Doofenshmirtz calls himself a dummkopf and states that he should have rotated the sun instead of the moon.


Read the transcript of The Doof Side of the Moon.


End Credits

Last Verse of "Keep on Building".


Click here to view more images from "The Doof Side of the Moon".
View the image gallery for "The Doof Side of the Moon".

Running Gags

I know what we're gonna do today!

Phineas: You know, begging is really unbecoming. I mean, I like smiles as much as the next guy, and milk is a classic. But what Danville really needs is a biiiiiig tourist attraction. Ferb, I know what we're gonna do today!

The "Too Young" Line

Candace: Spy cameras? Wouldn't it be easier to just show my mom what Phineas and Ferb make?

Albert: I don't know. Is that easier?

Candace: No! No it's not easy! It's never easy! I need help.

Ferb's Line

Isabella: Hey Phineas, how are we gonna to know when to stop building?

Phineas: I guess we'll just know when we get there.
Building gets stuck when it reaches the moon
Ferb: We're there.

Phineas: That's one small step for Ferb; one giant building for Danville.
While entering an office looking room on a monorail.

Phineas: And this is the- Oh that's right, we sublet this floor.

Ferb: That was a mistake.

What'cha doin'?

Isabella: Hey Phineas. What'cha doin'?

Phineas: Ferb and I have decided to construct the world's tallest building. Wanna help?

Isabella: Sure. Who wouldn't want to be a part of the "Phineas and Ferb" project?

Hey, where's Perry?

Phineas: You can pick up your hardhat right over there next to Perry. Hey, where's Perry?

Oh, there you are, Perry


Perry's entrance to his lair


Evil Jingle

Doofenshmirtz Four Seconds Later!

The bird that runs into Phineas and Ferb's invention

Two birds run into building at the same time as the moon starts to move along with the building.

Memorable Quotes

Announcer: Looking for a peaceful family getaway? Then come visit delightful Danville! We've got grass, milk, and smiles! So come to Danville, pretty please?
Stacy: Ooh, sounds like fun, but I have to go to the eye doctor.

Candace: Okay, but just don't get big, thick glasses because then you'd be a nerd, and I can't be seen with you.
Stacy: Oh, Candace. You're so shallow.
Candace: I know. I am so shallow.
(Both laughs)

Candace: But seriously, don't get any big nerdy glasses.
Albert: What's in the box, anyway?

Irving: It's my old collection of spy cameras. I'm gonna take them over to Phineas and Ferb and see what they can do with them.
Albert: (takes box from Irving) Gimme those!
Irving: Give them back, Albert!
Albert: (dumps out all of the cameras) Oopsies.
Irving: (gasps) You pick those up, Albert!
Albert: (takes out nun-chucks) Make me! That is, if you're "ninja" enough!
Irving: You're a jerk! I'm gonna go play with Phineas and Ferb.

Albert: Fine! You do realize that these cameras are now a forfeit?
Candace: Yeah, sure, Jenny, but what have whales ever done for me?

Albert: Well, hello.
Albert hits himself on the head with the nunchucks
Candace: If that's the way you feel, I'll get someone else to bust my brothers.
Albert: I'll help you.
Candace: Are you talking to me?
Albert: As a damsel in distress, I have to help you, milady, as part of my medieval knight's code.
Candace: I'm outta here.
Albert: But don't you wanna bust your brothers?
Brakes heard, Candace walks back
Candace: I'm listening.
Albert: Well, have you considered applying the manly science of spy cameras to your problem?
Candace: Spy cameras? Wouldn't it be easier to just show my mom what Phineas and Ferb make?
Albert: I don't know. Is that easier?
Candace: No! No it's not easy! It's never easy! I need help.
Albert: And manly technological surveillance.
Candace: I need nerd help, will you help me?

Albert: You have my word. My nerd word.
Major Monogram: We need you to get over there unrealistically fast. Good luck Agent P. (Agent P is gone, leaving a spinning chair) Agent P?
Dr. Doofenshmirtz: So, to recap, I rotate the dark side of the moon towards the Earth, eliminating the full moon, and corner the market on evil!

Perry looks in disbelief
What? It's genius. Why are you looking at me like I'm an idiot? Would an idiot build this?
Pushes button that reveals a jellybean taped to a cork.

Oh wait, wait, not that. That's just a cork with a jellybean taped to it. But, don't judge it, it's a layered idea. Now behold, the Lunar rotate-inator! Oh, wait, it's not up there yet. Hold on. Wait. Almost there. Okay, there. Now you can behold.
In an exterminator truck

Candace: So, your father's an exterminator?
Albert: No. Why do you ask?

Candace: Nervously No reason.
Albert: Irving! You bring those cameras back down here this instant!

Irving: Oh, why don't you come up here and endeavor to reclaim them?
Albert: We shall!
Candace: Actually, I don't do high places.

Albert: I shall!
Candace: I win! Through the power of nerd help! (Laughs)

Phineas: Hey Candace! Working on your cackle?
Candace: You guys are so busted. (Car honks) What's that I hear? Oh that's right, it's the inevitable.

Phineas: Oh, I thought it was Mom's car.
Perry trips on the cork while trying to stop Dr. Doofensmirtz
Dr. Doofenshmirtz: Ha! I told you it was a layered idea.
The moon starts to move along with the building
Phineas: Hm. I don't remember adding that.
Dr. Doofenshmirtz: Wait, this doesn't make any sense. The moon is rotating while the dark side isn't moving! Ooh, I bet you had something to do with this, didn't you, Perry the Platypus? You're always messing me up. You're just mean. Mean, Perry the Platypus. Plain mean, that's all.

Perry sees the building coming up on them

What are you doing, making magic fingers at me? Are you even listening to me?
Dr. Doofenshmirtz: Oh, I see. The light from the moon is just the reflection off the sun! Dummkopf! I should have rotated the sun.

Background Information

  • It is true that crime rates increase dramatically during the full moon.
  • When on the rollercoaster Phineas said 'The studio audience floor'. They might have been breaking the fourth wall, or just made a random floor.
  • In this episode Stacy says she has to go to the eye doctor. She may have gotten glasses, but this is still unknown.
  • There were people still inside the building when it was rotated.
  • When Perry puts on the viking helmet, Wagner's "Ride of the Valkyries" can be heard.
  • When Albert was claiming the building won't disappear before Linda comes, he says that no force of the earth will move it. This is correct, because the moon, which is not a force of the earth, moved the building before Linda came.
  • When Doofenshmirtz claims he should have rotated the sun after a failed attempt to to rotated the moon's dark side, he would've failed the second time because the sun lacks a darks side.

Production Information

  • Before the episode aired on TV, it was included as a bonus episode on the A Very Perry Christmas DVD. [1]
  • Premiered on July 19, 2010 in Latin America on Disney Channel entitled "El lado oscuro de la Luna" ("The Dark Side of the Moon"), in Spain was called "El Lado Doof de la Luna" ("The Doof Side of the Moon").
  • This episode aired on Verzion on Demand on October 1, 2010.
  • In Disney Channel Brazil, this episode was paired with "We Call it Maze".

International Premieres

  • July 19, 2010 (Disney Channel Latin American)
  • July 20, 2010 (Disney XD UK)
  • July 31, 2010 (TVNZ 2)
  • August 7, 2010 (Disney Channel Asia)
  • August 20, 2010 (Disney Channel Brazil)
  • October 14, 2010 (Disney XD Poland)
  • October 31, 2010 (Disney XD France)
  • November 20, 2010 (Disney XD Spain)
  • December 29, 2010 (Disney Channel Spain)
  • February 18, 2011 (Disney Channel Scandinavia)
  • March 5, 2011 (Disney Channel UK)


  • Isabella's hard hat expands in size when she puts it on.
  • When Linda was pulling in, she should have seen the building from the driveway.
  • When Albert goes into the monorail to chase Irving, no one is sitting in the seats behind him. A few seconds later, Phineas and Ferb are shown sitting in the seats behind him.
  • Perry breaks the glass in the astronaut helmet, but later when Perry puts it on Doofenshmirtz, the glass is still on and Doofenshmirtz is able to go into space safely. However, Doofenshmirtz said he had obtained numerous space helmets, so Perry could have grabbed one of the other ones.
  • When Doofenshmirtz is showing Perry the graph, when the green was zoomed in it's green and when it zooms out it is yellow.
  • Real space helmets are made from polycarbonate. So there's no way Perry could have shattered his trap with a high note. Instead, Perry could lift the space helmet.
  • Doofenshmirtz was rotating the Moon around.The building should have just turned around,not be lifted into space. Also, the Earth rotates and the Moon goes around the earth. However, the building does not appear to be moving an inch before it was struck by Lunar-Rotate-Inator.
  • Perry's viking hat disappears when the space helmet breaks.
  • Albert mysteriously disappears when Phineas greets Linda.
  • When Phineas, Ferb, and Isabella were constructing the building, the building looked different compared when it was constructed.
  • It takes 3 days to go to the moon but it took them 1–2 minutes to get there.
  • Irving's collar turns from white to green for a split second after Linda's car honks.
  • When Perry slips, the floor was green and black but when Perry puts his head up, the floor turns gray.
  • When Albert just got on the monorail, there were black handles in front of Albert. However, when the monorail starts moving the black handles are gone.
  • Albert and Irving have eyebrows but in most scenes, the eyebrows did not show.
  • When Phineas and Ferb appeared sitting in the seats beside Albert, Albert's glasses are bending.
  • The bottom part of the building hit the fence but the fence wasn't damaged.
  • When Phineas, Ferb and Isabella reached the moon, the moon was blue and it has the US flag and the Lunar Rover but when the moon gets hit by the Lunar-Rotate-Inator, The moon becomes smaller and white and the Lunar Rover and US flag are gone and didn't show again.
  • When Perry pushed the Lunar-Rotate-Inator, the Lunar-Rotate-Inator stopped zapping.
  • When Albert just got on the floor where Irving is at, there was a brighter yellow above the red lines but when Albert got on the elevator, it becomes the same color above the red lines.
  • When the building starts rotating, it's supposed to make dirt on the grass but it didn't.



  • The title is a parody of the phrase "The Dark Side of the Moon," referring to the side of the Moon that is never seen from Earth (as well as a famous 1973 album by Pink Floyd). The episode also originally aired just 2 weeks after "Wizard of Odd", which may be a reference to how many people believe that that Pink Floyd album complements the movie The Wizard of Oz when played together.
  • Neil Armstrong - Phineas says a line based on "That's one small step for [a] man, one giant leap for mankind.", the first words spoken on the Moon by Neil Armstrong.
  • The statue that appears as part of the construction resembles a more modestly-dressed version of Sandro Botticelli's painting The Birth of Venus.
  • Irving said that Albert has "only two (nerd words) left". This refers to some magic creatures, like Aladdin's genie, whom has the powers to grant wishes but limited to only three.
  • Dumbo - The elephants seen setting up during the construction of the building may refer to the elephants who assisted in the construction of the circus in this Disney movie.
  • The way the building is constructed may be a reference to a series of growing tower games.
  • M.C. Escher - Phineas states having an M.C. Escher floor in the building.
  • Mister Rogers' Neighborhood - Linda tells Phineas and Ferb that they make Danville more interesting place "just by being you", which is something Mister Rogers often said on his television show.


  • This is one of the few episodes where Perry does not defeat Doofenshmirtz.
    • In fact, Doofenshmirtz's Cork with a Jellybean taped to it may have been what TV Tropes calls a Xanatos Gambit. Where the villain prepares for the hero's inevitable success, and prepares to turn it on them. He supports this with the quote, "I told you it was a layered idea." But Doofenshmirtz might have simply taken note of Perry's misfortune.
  • Quirky Worky Song is heard twice in this episode. Once while the gang are gathering materials, and a differently-arranged version is heard during the tour of the building.
  • Despite the show's frequent stance against "imitatable acts of violence", Albert is seen swinging nunchucks in this episode, which is a very dangerous weapon.



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