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"Tri-Stone Area" is an episode of Phineas and Ferb.


Note: The parts of the episode with Dan Povenmire and Jeff "Swampy" Marsh are in bold. In 27,000 B.C., Phinabunk and Gerb (caveman versions of Phineas and Ferb) go through their stone-carved blueprints in the backyard and decide to make a wheel.

Jeff "Swampy" Marsh shows Dan Povenmire his storyboards for the caveman episode, and explains that all of the characters will speak in a nearly incomprehensible cave-talk and Doofenshmirtz will just grunt. They both agree that they will explain the premise in a low budget live-action photo animation when needed, so the audience won't get confused. Povenmire then asks Swampy where Perry is.

Bunka (Perry), a platypus-like animal with frilly spiked fur, a big brow, long canines, and red spines on his tail, is briefed by Monobrow, and a monkey named Gnarl. Monobrow explains to Bunka that Doofengung is planning something that Bunka should thwart. After briefing Bunka, Monobrow accidentally slips on one of Gnarl's banana peels.

Da and Mog say goodbye by smelling each other's armpits before Da goes out to hunt. Mog then notices her messy hair in the mirror, and decides to go to Bobbi's to get it done, putting Can-tok in charge by presenting her with a staff as she leaves. Can-tok tells Phinabunk and Gerb that she's in charge before going to communicate with Stacy long distance by using the vibrations of a log. Outside, a pile of rocks are delivered to Phinabunk and Gerb, who tell Isabelock, Boofgard and Baljug to make a wheel out of one of them, though it takes a few tries for them to get it right.

At Doofengung's cave, a neanderthal-esque Doofenshmirtz entertains himself by watching water droplets slowly drip from a stalactite. Bunka crashes through the stone wall and Doofengung traps him in a bone cage. Doofengung explains that Roger, a human who is apparently one step ahead of him on the evolutionary chain, is living luxuriously while Doofengung lives in a dirty cave. Doofengung states that it is unfair, and begins to throw a fit.

Dan decides that the caveman episode was a bad idea, but Swampy, who has become interested, takes over. Swampy explains to Dan that Phinabunk and Gerb had completed their design of the wheel, and present it to their friends. Can-tok notices them playing with their wheels outside, and runs off to inform Mog. Phinabunk realizes that the four wheels can be put together to pull a single vehicle, and the children decide to construct one.

Meanwhile, Doofengung shows Bunka his Stick-inator, explaining that he plans to poke a mammoth with it, causing the mammoth herd to rampage through Roger's territory, scaring him off so Doofengung can go claim it. Dan translates Doofengung's plan for the audience.

As Can-tok walks home, disappointed that Mog would not listen to her, she runs into Phinabunk, Gerb and the others in their new car-like vehicle constructed with rock and wood. She pursues them, but is momentarily distracted by Jerabunk. Phinabunk and Gerb's vehicle rides past Conk, whose foot is frozen to a glacier. As Can-tok chases after Phinabunk and Gerb, she is picked up by a vulture and carried off to an active volcano. Can-tok hits the vulture with her staff, causing it to drop her near the lava, which burns the tip of the staff.

At the same time, Doofengung uses his stick-inator on one of the mammoths, though his plan backfires as the mammoths turn around and chase him. As Doofengung runs past Phinabunk and Gerb, the mammoths stampede over the vehicle, completely crushing it before Mog can see it. Can-tok waves her staff in frustration, and it suddenly sparks fire. As the mammoths crush his cave house, Doofengung curses Bunka, who walks past him, still in his bone cage.

Dan and Swampy soon realize that they forgot to put a song in the episode, and begin to write one while dancing. Phinabunk, Gerb, and all of their friends and family gather around Can-tok's fire and begin to sing a caveman version of Gitchee Gitchee Goo in celebration.




  • In some scenes, Gretchen is not wearing her glasses when Roger, Carl, and Bobbi are all seen wearing their glasses.
  • Before the song Zubada starts, only Phinabunk, Gerb, Can-tok, Bunka, Isabelock, Boofgard, Baljug, Jerabunk, and Mog and Da were seen but then, the Caveside Girls appear out of nowhere.
  • When Phinabunk sings the line "Ooh chaka ooh chaka" in the song, Gerb's nose briefly turns into an outlined square.
  • The first time Katie is seen, she does not have sandals on. The second time after, she has sandals.
  • When the mammoths trample Doofenshmirtz house, they go from left to right. But in Doofenshmirtz plans, Roger's house was on the left of Doofenshmirtz house. The mammoths would have to trample Roger's house too, which would have made Doofenshmirtz plot a success.


  • The episode takes place in 27,000 B.C.
  • Dan Povenmire and Swampy Marsh make an appearance in this episode, in stop-motion.
  • This is the first episode where, for most of the episode, the characters don't speak English.
  • This episode may have explained how Conk ended up frozen in an iceberg in "Boyfriend From 27,000 B.C.". Conk became distracted while the boys rode by, and the wall of ice snuck up on him and trapped his foot.
  • When Can-tok runs through the bushes, her hair is briefly changed to the way Candace's hair looks.

    Can-tok with Candace's hairstyle.

  • As none of the characters speak English, this episode is probably hard to understand on its own. However, a long-time viewer may pick up on the equivalents of catch phrases like "A platypus? ... Perry the Platypus!", "Behold, my ...inator!", "Aren't you a little young ...", and such. Furthermore, some words are repeated through the episode, and some are rather similar to English words; examples: "ni" is "no", "in charga" is "in charge", etcetera.
  • The fourth wall is broken when Dan says Swampy's part of the episode is hard to understand, and Swampy says that's a good reason why they're doing the stop-motion pictures showing themselves in the episode.
  • Doofenshmirtz uses the famous illustration, "The Ascent of Man," in his presentation as he had done in "Phineas and Ferb Hawaiian Vacation." Also, as in Hawaii where Perry had a party on the deserted isle while Doofenshmirtz suffered, Roger Doofenshmirtz parties in pre-historic Danville while Doofenshmirtz complains about his living accommodations.
  • All human characters walk around barefoot, much like most characters from The Flintstones. The Tri-Stone Area is also a parody of Bedrock.


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Major Characters: Phineas FlynnFerb FletcherCandace FlynnPerryDr. Heinz Doofenshmirtz

Secondary Characters: Linda Flynn-FletcherLawrence FletcherIsabella Garcia-ShapiroBaljeet TjinderBuford Van StommMajor Francis MonogramJeremy JohnsonCarl KarlStacy HiranoGinger HiranoMillyKatieHollyAdyson SweetwaterGretchenVanessa Doofenshmirtz
Recurring characters: Giant Floating Baby HeadDjango BrownColtraneCharlene DoofenshmirtzRoger DoofenshmirtzVivian Garcia-ShapiroIrvingJenny BrownSuzy Johnson Nana Shapiro• • DannyBobbi FabulousShermanMeapMitchNormClyde FlynnBetty Jo FlynnPinkyAlbertPeterKlimpaloonTalking ZebraMonty MonogramHildegard JohnsonReginald FletcherWinifred FletcherAloyse von Roddenstein
Minor Characters: JerryBigfootYetiKhaka Peu PeuThe RegurgitatorBob WebberPrincess BaldegundeMelissaUnnamed Fireside GirlsAgent EBrobotsDrill SergeantBuck BuckersonTiana WebberJack JohnsonMrs. JohnsonWendyEliza FletcherNicoletteMandyThaddeus and ThorMindyAmandaLucy FletcherAdrian FletcherBeppo BrownDr. HiranoAnnabelle JohnsonSaraBrigitte, Josette, and ColletteMishti PatelLiam McCrackenRodrigoMorgGlenda WilkinsDr. GevaarlijkHeinz Doofenshmirtz's motherBlanca DishonProfessor PoofenplotzEliza M. FeyersiedLyla LolliberryBalloony • Corn Colossus • Professor Parenthesis
Guest Characters: Santa ClausKim Possible PinocchioBaby BaboonThor OdinsonSpider-ManHulkIron ManRed SkullNick FuryVenomWhiplashMODOK

Season One: "Rollercoaster" • "Candace Loses Her Head" • "The Fast and the Phineas" • "Lawn Gnome Beach Party of Terror" • "The Magnificent Few" • "S'Winter" • "Are You My Mummy?" • "Flop Starz" • "Raging Bully" • "Lights, Candace, Action!" • "Get That Bigfoot Outta My Face!" • "Tree to Get Ready" • "It's About Time!" • "Jerk De Soleil" • "Toy to the World" • "One Good Scare Ought to Do It!" • "A Hard Day's Knight" • "I, Brobot" • "Mom's Birthday" • "Journey to the Center of Candace" • "Run Away Runway" • "I Scream, You Scream" • "It's a Mud, Mud, Mud, Mud World" • "The Ballad of Badbeard" • "Dude, We're Getting the Band Back Together" • "Ready for the Bettys" • "The Flying Fishmonger" • "Phineas and Ferb Get Busted!" • "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" • "Put That Putter Away" • "Does This Duckbill Make Me Look Fat?" • "Traffic Cam Caper" • "Bowl-R-Ama Drama" • "The Monster of Phineas-n-Ferbenstein" • "Oil on Candace" • "Unfair Science Fair" • "Unfair Science Fair Redux (Another Story)" • "Out to Launch" • "Got Game?" • "Comet Kermillian" • "Out of Toon" • "Hail Doofania!"

Season Two: "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" • "Summer Belongs to You!" • "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 Three: "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 Break Up" • "Quietest Day Ever" • "Doonkleberry 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?" • "Ferb TV" • "When Worlds Collide" • "What'd I Miss?" • "Road to Danville" • "This is Your Backstory" • "Blackout!"
Season Four: "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" • "Mission Marvel" • "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" • "Phineas and Ferb Save Summer" • "Father's Day" • "Imperfect Storm" • "The Return of the Rogue Rabbit" • "It's No Picnic" • "The Klimpaloon Ultimatum" • "Operation Crumb Cake" • "Mandace" • "Phineas and Ferb: Star Wars" • "Lost in Danville" • "The Inator Method" • "Night of the Living Pharmacists" • "Tales from the Resistance: Back to the 2nd Dimension" • "Doof 101" • "Act Your Age" • "Last Day of Summer" • "O.W.C.A. Files"

Locations at or near Danville: DanvilleSeattleMr. Slushy FranchiseDoofenshmirtz Evil IncorporatedFlynn-Fletcher HouseAtlantisGoogolplex MallOld Abandoned Amusement Park

Other: AfricaEnglandNew York CityBig BenMarsTokyoLondonChinaIndiaCanadaChileHawaii

Today is Gonna Be a Great DaySummer Belongs to YouCity of LoveJump Right InPerry the Platypus ThemePerry Saves ChristmasLet it Snow, Let it Snow, Let it SnowGitchee Gitchee GooWhere Did We Go Wrong?BustedLittle BrothersWhat'cha Doin?Carpe DiemS.I.M.P. (Squirrels In My Pants)I'm MeRollercoasterCouldn't Kick My Way Into Her HeartThe Ballad of KlimpaloonEvil for Extra CreditBackyard BeachHappy New YearGreat to Be a BabyWhat Might Have BeenSerious FunCurtain Call/Time Spent TogetherFollow the SunSilhouettes