What Do It Do?
Candace, Linda, Phineas and Ferb wonders what is the machine in their front yard.
Seizoen: [[Seizoen 2|2]]
Productie code: 219A
Uitzend nummer: 82
Geschreven door:
Martin Olson
Geschreven & script door:
Jon Colton Barry
Piero Piluso
Uitzend informatie
Disney Channel NL Première:
January 15, 2010
Disney XD NL Première:
November 14, 2009
Internationale Première:
October 24, 2009 (UK)
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When Doofenshmirtz's latest invention lands in the front yard of the Flynn-Fletcher Household, Phineas, Ferb, Candace and Linda try to find out what it does.

Episode SummaryEdit

Lawrence is outside putting up a a bird feeder and house on a tree. He presses a button and the house opens. He decides that it doesn't do what he wanted it to do but leaves it. In the living room, Phineas and Ferb are watching a program on reverse engineering. It talks about what it is and how to do it. Phineas asks where Perry is once the program has finished and the scene cuts to Major Monogram asking Carl where Perry is. Carl says he came in early. Monogram then decides since Perry has his mission to go home.

Perry is already on Heinz Doofenshmirtz's hover jet and they are both fighting. Perry gets caught in one of the many traps that were set. Doofenshmirtz then tells him about one of his first dates. It was with Linda Flynn and they were in a car park, going to watch a film. Linda says that she would like to be a pop star one day. Doofenshmirtz sarcastically replies that he will take over the world, and she suggests that he should start small and try to take over the Tri-State Area. Doofenshmirtz says it's unlikely but he'll try. He then brings out a machine to make the movie's sound 5th Dimentional and attaches it to their car. Unfortunately, the machine makes the cinema screen explode and blast off into the sky. Whilst finishing his flashback, Doofenshmirtz trips on one of his traps and knocks his latest machine into the Flynn-Fletcher House in the front lawn. Candace sees the machine and assumes that Phineas and Ferb built it. She calls Linda to see it and says the boys made it. Linda calls the boys and asks what that machine is. Phineas says they didn't build it but they wanted to know what it did. Linda says not to touch the machine, so Phineas and Ferb do some reverse engineering and create a duplicate in the back yard. Linda phones Lawrence whilst he is in the middle of a presentation about the history of Wistershire and Chedderton. She asks what that thing was in the garden and Lawrence says that he made it, thinking it was the bird feeder. He says he has to go and cuts Linda off.

Doofenshmirtz is still in one of his traps and presses a button to release Perry. Perry then tries to steer the jet away from Mt Kilimanjaro. The side of the jet hits the mountain and Perry falls into another trap. Doofenshmirtz then comments that his ship has as many traps as a golf course.

In the backyard, Phineas, Ferb, Buford, Baljeet, Irving and Isabella are trying to work out what it does. In the end, Baljeet and Isabella are having a "romantic" dinner when the machine picks up the candle and is about to destroy it. Phineas tells it to put the candle down and it follows his instructions. Everyone decides that it is an anti-romantic machine. Linda is still out the front of the house and she phones Lawrence again about the machine. Candace is meanwhile trying to get Linda to see what Phineas and Ferb had built. Candace explains that how Linda feels at the moment is how she feels when trying to bust the boys. Candace then says that she used the drag Linda to the machine. Linda decides to do the same with Lawrence and drags him out of his presentation. Whilst being dragged off, he asks if anyone has any questions. Everyone puts their hand up but Lawrence is out of the room before he can answer them.

Perry escapes his trap once again put grabs the scepter from the statue of the Earl of Whisteshire. He activates all of the traps and steers the hover jet again. Perry throws the scepter out of the jet and it hits the machine in the front yard. Candace is outside talking to Stacy about how she will bust the boys but the machine floats up, covers the mark it made in the grass and flies to the back of the house. It sees the duplicate and they both fall in love. They fly off into the sky just as Linda and Lawrence are getting out of the car. Candace is still trying to show Linda Phineas and Ferb's machine but then she sees them flying off into the sky. She gives up and walks away. Ferb is telling everyone about if you reverse engineer a heart you get lots of mushy red stuff. The episode ends in everyone agree with a yeah.


Gallery Edit

What Do It Do? title card
The image gallery for this episode may be viewed here.

Running GagsEdit

The "Too Young" LineEdit

Linda: Hold on, is it buzzing?
Candace: Yes, yes it is.

Ferb's LineEdit

Isabella: I wonder what would make someone wanna build something to destroy romance in the first place?

Ferb: Well, if you reverse engineer the human heart, you're bound to find love at its core.
Buford: And gross, smushy, red stuff!
Ferb: Yes, love and gross, smushy, red stuff.
Irving: And ventricles!
Ferb: Actually, I think ventricles is already included in gross, smushy, red stuff.

Everyone: Yeah...

Whatcha doin'?Edit


Perry's entrance to his lairEdit

Not shown, Carl mentioned to Major Monogram that Perry went early.

Evil JingleEdit

Doofenshmirtz Rocket Power Jet Skiff!

Memorable QuotesEdit

Linda: This song makes me want to be a popstar.

Doofenshmirtz: Yeah right, and I'm gonna rule the world.
Linda: Well, why not?
Doofenshmirtz: Yeah, like I can do that.

Linda: Well, instead of the world, why not start small, like... the Tri-State Area?

Doofenshmirtz: Oddly enough, she did become a pop star and...I'm still struggling with the whole Tri-State Area thing, but the dream's still alive.

Doofenshmirtz: Perry the Platypus, I just...a golf course! A golf course has lots of traps! I should have said that one first.

Linda: Now tell me this isn't terrifying!

(Candace dances while singing repeatedly "It's a busting feeding frenzy, stay outta the water!")

Lawrence: I'm sorry I ever doubted you.

Phineas: Ask/bust us what?

Candace: Tell me you didn't build that thing.
Phineas: We didn't build that.
Candace: Hah! Quick, bust 'em - wait, you didn't?

Phineas: Not that I'm aware of, no.

Candace: Yeah, Mom, love ya, BYE!

Perry and Doofenshmirtz are flying over Paris.
Doofenshmirtz: "PIERRE! Hides and laughs Did anyone look? I pictured, like, half the people down there looking around like: French accent "Who calling my name?" Laughs

Phineas: Wow, two anti-love robots falling in love...
Buford: That's what I call ironing.

Candace Flynn: (dances while singing) It's a busting feeding frenzy, stay outta the water! It's a busting feeding frenzy, stay outta the water! It's a busting feeding frenzy, stay outta the water!

Linda Flynn: Candace, where did it go?

Candace Flynn: It's a busting feeding frenzy, stay outta the water! Uhh, I don't know. But, mom you have got to come to the backyard..
(The two robots fly across the sky leaving a heart-shaped mark of smoke and it disappears. Candace looks up and Linda looks up.)
Uhh, never mind.

Background InformationEdit

  • This episode has Linda mirroring Candace's behavior, trying to convince Lawrence of the strange gizmo as Candace tries to convince Linda of the boys' creations.
  • Baljeet is shown to show some affection to Isabella
  • Dr. Doofenshmirtz drove an AMC Gremlin to the drive-in movie theater.
  • The episode shows Linda's inspiration of becoming a pop star even though she did and Doofenshmirtz taking over the Tri-State Area from Linda's suggestion of starting small.
  • Zanzibar (the name of the band that sings "What Do It Do?") is the name of the episode of a 1996 musical episode of Rocko's Modern Life that won Phineas and Ferb co-creators Dan Povenmire and Jeff "Swampy" Marsh an EMA (Environmental Media Awards) Award.
  • The "Kronk for Hire" cue plays as Dr. Doofenshmirtz educates Perry about- and warns him that he is going to crash into- Mount Kilimanjaro.


  • Phineas and Ferb do the same dance during the song as they did in Mix and Mingle Machine and Technology vs. Nature.
  • The episode shows Doofenshmirtz date with Linda and she was the one who convinced him to try to takeover the Tri-State Area, which was mentioned in the 2009 Radio Disney premiere.
  • Irving reappears in this episode and only has one line of dialogue (actually fewer than Ferb, who had three).
  • Nitpicker's guide: On the drive-in date flashback, Doofenshmirtz's white disco coat turns green when he gets in the car, but goes back to white when the scene changes to the outside POV (when Linda tells him to get the car speaker).
  • This is the second episode where Perry does not interact with Major Monogram (The first being Hail Doofania!).


  • Feeding Frenzy - Candace dance and sings (It's a Busting Feeding Frenzy; Stay outta water!) that about the game
  • Julius Caesar (the play by William Shakespeare)- Phineas addresses Isabella, Buford, Baljeet, and Irving as "Friends, Bullies, Irving" similar to "Friends, Romans, Countrymen" from Mark Antony's speech.
  • Lawrence's tale about Whiskershire mirrors the story of The Pied Piper of Hamelin.
  • Towards the beginning of the episode, Phineas and Ferb are seen watching The Uncovery Channel, which seems similar to the Discovery Channel, including the title.
  • Zanzibar is an island off the coast of Africa which is part of the United Republic of Tanzania. Billy Joel also has a track called "Zanzibar[1]" on his 1978 album 52nd Street. However, it's the story of a bar named Zanzibar, not reverse engineering.


Vorige geproduceerde aflevering:
"Finding Mary McGuffin"
"What Do It Do?" Volgende geproduceerde aflevering:
Vorige uitgezonden aflevering:
"Nerdy Dancin'"
Volgende uitgezonden aflevering:

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