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Our planets are going to collide! You do know what that means?

— Baljeet

After discovering that a strange planet is hurtling directly towards Danville, Phineas and Ferb set out to avert a disaster, while Buford looks forward to making contact with its alien race. Candace cannot bust them until midnight due to signing a contract known as the "Bust Accord" so she anxiously waits until the time comes. Meanwhile, Dr. Doofenshmirtz uses a Sphere-Attract-inator to try and steal the world's largest ball of twine.

Episode Summary[]

Candace is talking to Stacy, until the phone gets cut off because of a laser beam, which hits a planet. Candace calls her mother, but Linda reminds Candace about a contract called "The Bust Accord", which states that Candace can only try to bust the boys once a day. Candace then decides to stay up and wait until midnight to bust her brothers.

Outside, Phineas, Ferb, Isabella, Baljeet, and Buford are having a sleepover, so they can see the galaxy from a probe. Buford tells the story of his encounter with an alien species, the Whalemingo, and the time he spent with one, which he named Tristan. Meanwhile, Perry is called late at night to go check up on Doofenshmirtz.


Tristan, Buford's Whalemingo friend.

Phineas fires up their telescope and they look all around space. The telescope focuses on a planet of Whalemingos, and Buford spots Tristan. Meanwhile, Perry arrives at Doofenshmirtz Evil Incorporated and gets trapped in a Double Dutch machine. Doofenshmirtz hears Perry come in and explains his plan to steal the world's largest ball of twine by using the Sphere-Attract-inator.

Back at the Flynn-Fletcher house, the gang continue watching the planet of Whalemingos. Suddenly, the screen becomes out of focus and the planet grows larger. Baljeet finds out that it is approaching the Earth, and calculates that a collision will happen by midnight.

Double Dutch

The Double Dutch machine.

At Doofenshmirtz Evil Incorporated, Perry escapes from the trap and launches himself at Doofenshmirtz. They tussle and eventually start up the Double Dutch machine. They both try to keep up with the jump rope and fight at the same time.

Meanwhile, Phineas has the idea to build a colossal spring to bounce the planet back into space. Doofenshmirtz escapes the Double Dutch machine and turns it off. Perry attacks him and they tumble backwards, hitting the Sphere-Attract-inator, causing it to fire. It hits the world's largest ball of twine, drawing it closer.

At midnight, Candace finds her mom and dad listening to records. She explains to them that it is tomorrow, so Linda follows Candace. At the same time, the planet of Whalemingos hurls down on the spring, and Buford meets eye-to-eye with Tristan.

The largest ball of twine floats by, catching on to the Whalemingo planet and unraveling. The ball eventually gets to Doofenshmirtz Evil Incorporated, but tiny. As the spring starts to uncoil, Buford tosses his lucky tambourine up to Tristan to remember him by. The Whalemingo planet goes up, causing the little ball of twine to move forward and the Sphere Attract-inator to move with it, throwing Doofenshmirtz off the edge of the building. Perry throws Doofenshmirtz a jump rope, and Heinz hangs on to it. Unfortunately, the machine is started by Perry, which bangs Doofenshmirtz up and down the building.

As the little ball of twine goes up with the planet, the machine wraps around the giant spring. At the same time, Candace directs Linda down the stairs to see it. Just as Candace calls out to Linda one last time, the Whalemingo planet goes up into space. Linda greets the kids and invites them in for a late night snack.


Read the transcript of When Worlds Collide.


End Credits[]

Second verse of "Whalemingo". (during the end credits when broadcast by itself)


Click here to view more images from "When Worlds Collide".
View the image gallery for "When Worlds Collide".

Running Gags[]

The "Too Young" Line[]


Ferb's Line[]

(Isabella tries to hold Phineas' hand but accidentally holds Ferb's instead)
Ferb: Don't worry, it will be alright.

What'cha doin'?[]


Perry's entrance to his lair[]

Sleeping in the lawn chair, Perry gets a call and the head rest pulls down, rolling him through some croquet hoops hitting the stake, where he drops down into his lair.

I know what we're gonna do today[]

Phineas: Guys, I know what we're gonna do tonight!

Hey, where's Perry?[]


Oh, there you are, Perry[]

By Major Monogram:

Major Monogram: There you are Agent P.

By Phineas:

Phineas: Hey sleepy head, do you want a snack too?

My watermelon![]

Said by one of the scientists.

Memorable Quotes[]

(After Agent P get stuck and tied up in the Double Dutch Machine)
Doofenshmirtz: Perry the Platypus, how did you get stuck in my Double Dutch Machine? It's not even a trap!
Major Monogram: Agent P, we just got word that Doof may have fired tomorrow's inator, today. This is a major breach in protocol. So, give yourself a good slap in the face, and get over there!
Baljeet: Based on my calculations, the planet will be here by midnight!
Buford: That's great news!
Baljeet: Our planets are going to collide! You do know what that means?
Buford: Sure, it's like when you have two sets of keys, and you keep one in the car.
Baljeet: No, it means - (realizes what Buford just said) NO! (facepalms)
Buford: Guys, we've got to save Tristain!
Baljeet: Anything else, Buford?
Buford: (annoyed) And the Earth.
(Candace running down that stairs)
Candace: Hurry! Let's go! Let's go!
Linda: Clearly we need a thirteenth amendment to The Bust Accord.

Background Information[]


Production Information[]

  • This episode aired on Disney Channel On Demand on September 7, 2012.

International Premieres[]

  • November 30, 2012 (Disney Channel Asia)
  • December 28, 2012 (Disney XD Canada)
  • January 18, 2013 (Disney XD Spain)
  • January 25, 2013 (Family Channel)
  • February 18, 2013 (Disney Channel Latin America and Brazil)
  • March 9, 2013 (Disney XD Latin America)
  • April 14, 2013 (Disney Channel Portugal)
  • September 15, 2013 (RCTI Indonesia)


  • Phineas' eyes point in different directions when the kids build the spring.
  • When Perry first enters Doofenshmirtz's lair, he passes a box with a green gauge on it. When he hits the Double Dutch machine and starts jumping, the gauge box disappears.
  • When Perry and Doofenshmirtz touch the Double Dutch machine accidentally, Doofenshmirtz's panda slippers disappear.
  • When Doofenshmirtz first shows the picture of the World's Largest Ball of Twine, only the Farmer is in the shot to the left side of the picture. When Doofenshmirtz breaks the blackboard, the Farmer and his wife are in the picture on the right side of it.

Perry's tail is underneath the Double Dutch machine.

  • When Doofenshmirtz is telling Perry to back up to stay out of the way of the World's Largest Ball of Twine, a layering error causes Perry's tail to appear to be underneath the Double Dutch machine.
  • At the end of the episode, Phineas is seen running inside with the others. As Perry lands on the deckchair, Phineas is still outside and looks at Perry slightly off model.
  • In the Bust Accord, "During" in "During a date with Jeremy" is not capitalized.


  • Based on Candace's dialogue about failing to show the giant ant farm, this episode takes place right after or on the same day as "Gi-Ants".
  • Phineas mentions the Milkshake Bar ("Out to Launch").
  • The "I'm Lindana and I Wanna Have Fun!" Album is seen when Linda and Lawrence are listening to records.


  • When Worlds Collide - The episode's title is a reference to the 1933 science fiction novel, which was made into a film in 1951.
  • Close Encounters of the Third Kind - The silhouette of Candace against the light, seen when the planet arrives on their backyard, is similar to a scene from this 1977 alien encounter science fiction film.
  • Biggest ball of twine - The biggest ball of twine is an allusion to the real ball, popularized by "Weird Al" Yankovic in his song "The Biggest Ball of Twine in Minnesota".



Main article: Credits
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"Ferb TV"
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v - e - dPhineas and Ferb
Season 1
"Rollercoaster" | "Lawn Gnome Beach Party of Terror" | "Flop Starz" | "The Fast and the Phineas"
"Lights, Candace, Action!" | "Raging Bully" | "Candace Loses Her Head" | "I, Brobot"
"Run Away Runway" | "The Magnificent Few" | "S'Winter" | "Jerk De Soleil" | "Are You My Mummy?"
"Ready for the Bettys" | "I Scream, You Scream" | "Toy to the World"
"Get That Bigfoot Outa My Face!" | "It's a Mud, Mud, Mud, Mud World" | "Mom's Birthday"
"Journey to the Center of Candace" | "It's About Time!"
"Dude, We're Getting the Band Back Together" | "Tree to Get Ready" | "The Ballad of Badbeard"
"Greece Lightning" | "Leave the Busting to Us!" | "Crack That Whip" | "The Best Lazy Day Ever"
"Boyfriend From 27,000 B.C." | "Voyage to the Bottom of Buford" | "A Hard Day's Knight"
"Traffic Cam Caper" | "Bowl-R-Ama Drama" | "Got Game?" | "Comet Kermillian"
"Put That Putter Away" | "Does This Duckbill Make Me Look Fat?" | "The Flying Fishmonger"
"One Good Scare Ought to Do It!" | "The Monster of Phineas-n-Ferbenstein" | "Oil on Candace"
"Out of Toon" | "Hail Doofania!" | "Out to Launch" | "Phineas and Ferb Get Busted!"
"Unfair Science Fair" | "Unfair Science Fair Redux (Another Story)"
Season 2
"The Lake Nose Monster" | "Interview With a Platypus" | "Tip of the Day"
"Attack of the 50 Foot Sister" | "Backyard Aquarium" | "Day of the Living Gelatin"
"Elementary My Dear Stacy" | "Don't Even Blink" | "Chez Platypus" | "Perry Lays an Egg"
"Gaming the System" | "The Chronicles of Meap" | "Thaddeus and Thor" | "De Plane! De Plane!"
"Let's Take a Quiz" | "At the Car Wash" | "Oh, There You Are, Perry" | "Swiss Family Phineas"
"Hide and Seek" | "That Sinking Feeling" | "The Baljeatles" | "Vanessassary Roughness"
"No More Bunny Business" | "Spa Day" | "Phineas and Ferb's Quantum Boogaloo"
"Phineas and Ferb Musical Cliptastic Countdown" | "Bubble Boys" | "Isabella and the Temple of Sap"
"Cheer Up Candace" | "Fireside Girl Jamboree" |"The Bully Code" | "Finding Mary McGuffin" | "Picture This"
"Nerdy Dancin'" | "What Do It Do?" | "Atlantis" | "Phineas and Ferb Christmas Vacation!"
"Just Passing Through" | "Candace's Big Day" | "I Was a Middle Aged Robot" | "Suddenly Suzy"
"Undercover Carl" | "Hip Hip Parade" | "Invasion of the Ferb Snatchers" | "Ain't No Kiddie Ride"
"Not Phineas and Ferb" | "Phineas and Ferb-Busters!" | "The Lizard Whisperer" | "Robot Rodeo" | "The Beak"
"She's the Mayor" | "The Lemonade Stand" | "Phineas and Ferb Hawaiian Vacation" | "Nerds of a Feather"
"Wizard of Odd" | "We Call it Maze" | "Ladies and Gentlemen, Meet Max Modem!" | "The Secret of Success"
"The Doof Side of the Moon" | "Split Personality" | "Brain Drain" | "Rollercoaster: The Musical!"
"Make Play" | "Candace Gets Busted"
Season 3
"The Great Indoors" | "Canderemy" | "Run, Candace, Run" | "Last Train to Bustville"
"Phineas' Birthday Clip-O-Rama!" | "The Belly of the Beast" | "Moon Farm"
"Ask a Foolish Question" | "Misperceived Monotreme" | "Candace Disconnected"
"Magic Carpet Ride" | "Bad Hair Day" | "Meatloaf Surprise" | "Phineas and Ferb Interrupted"
"A Real Boy" | "Mommy Can You Hear Me?" | "Road Trip" | "Tour de Ferb" | "Skiddley Whiffers"
"My Fair Goalie" | "Bullseye!" | "That's the Spirit" | "The Curse of Candace"
"Escape from Phineas Tower" | "Lotsa Latkes" | "Ferb Latin"
"A Phineas and Ferb Family Christmas" | "Tri-Stone Area" | "Doof Dynasty" |"Excaliferb"
"Phineas and Ferb and the Temple of Juatchadoon" | "Monster from the Id" | "Gi-Ants"
"The Remains of the Platypus" | "Mom's in the House" | "Perry The Actorpus" | "Let's Bounce"
"Bully Bromance Breakup" | "Quietest Day Ever" | "The Doonkelberry Imperative‎‎"
"Meapless in Seattle" | "Delivery of Destiny" | "Buford Confidential" | "The Mom Attractor"
"Cranius Maximus" | "Agent Doof" | "Minor Monogram" | "What A Croc!" | "Sleepwalk Surprise"
"Sci-Fi Pie Fly" | "Sipping with the Enemy" | "Tri-State Treasure: Boot of Secrets" | "Doofapus"
"Norm Unleashed" | "Where's Perry?" | "Where's Perry? (Part Two)" |"Ferb TV"
"When Worlds Collide" | "What'd I Miss?" | "Road to Danville"
"This Is Your Backstory" | "Blackout!"
Season 4
"For Your Ice Only" | "Happy New Year!" | "Fly On the Wall" | "Bully Bust" | "My Sweet Ride"
"Der Kinderlumper" | "Sidetracked" | "Primal Perry" | "Mind Share" | "Backyard Hodge Podge"
"Bee Day" | "Bee Story" | "Great Balls Of Water" | "Where's Pinky?"
"Phineas and Ferb Musical Cliptastic Countdown Hosted by Kelly Osbourne"
"Knot My Problem" | "Just Desserts" | "La Candace-Cabra" | "Happy Birthday, Isabella"
"Love at First Byte" | "One Good Turn" | "Thanks But No Thanks" | "Troy Story"
"Druselsteinoween" | "Terrifying Tri-State Trilogy of Terror" | "Face Your Fear" | "Cheers for Fears"
"Steampunx" | "Just Our Luck" | "Return Policy" | "Live and Let Drive" | "Father's Day"
"Imperfect Storm" | "The Return of the Rogue Rabbit" | "It's No Picnic" | "The Klimpaloon Ultimatum"
"Operation Crumb Cake" | "Mandace" | "Lost in Danville" | "The Inator Method"
"Tales from the Resistance: Back to the 2nd Dimension" | "Doof 101" | "Act Your Age"
Season 5
"Summer Block Buster" | "Cloudy with a Chance of Mom" | "Appetite for Adventure" | "License to Bust"
"Dry Another Day" | "Deconstructing Doof" | "Tropey McTropeface" | "Biblio-Blast!" | "A Chip to the Vet"
"More Than an Intern" | "The Aurora Perry-Alis" | "Agent T (For Teen)" | "The Haberdasher"
"The Candace Suit" | "Out of Character" | "Meap Me in St. Louis"
"Phineas and Ferb: Summer Belongs to You!" | "Phineas and Ferb Save Summer"
"Night of the Living Pharmacists" | "Last Day of Summer" | "O.W.C.A. Files"
Phineas and Ferb the Movie: Across the 2nd Dimension
Phineas and Ferb the Movie: Candace Against the Universe
"Phineas and Ferb: Mission Marvel" | "Phineas and Ferb: Star Wars" | "The Phineas and Ferb Effect"