Tri-Stone Area

The Tri-State Area is changed into the prehistoric Tri-Stone Area, and all the characters become cavemen and cavewomen. Nothing more is known at this time, but the episode first surfaced Dan Povenmire's YouTube account. There is a caveman version of Gitchee Gitchee Goo.

Episode summary
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. '''Dan Povenmire shows Jeff "Swampy" Marsh 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. Swampy then asks Dan where Perry is.'''

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. Monogram explains to Perry that Doofengung is planning something that Perry should thwart. After briefing Perry, Monobrow accidentally slips on one of Gnarl's banana peels.

Da and Mog say goodbye by smelling each others armpits before Lawrence goes out to hunt. Linda 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 even there was a doorway and Doofengung traps him in a bone cage. Doofengung explains that Roger, a human who is apparently a 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 Perry his Stick-inator, explaining that he plans to poke a mammoth with it, causing the mammoth heard 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, who's 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 Perry, who walks past him, still in his bone cage.

Dan and Swampy 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.

Songs

 * Quirky Worky Song (Caveman Version)
 * Zubada

Whatcha doin'?
By Isabelock:

By Boofgard:

Perry's entrance to his lair
None.

Evil Jingle
Bunkalunk Bunkalunk Bunkalunka!

Background Information

 * The episode takes place in 27,000 B.C.
 * The episode starts without an explanation why the story plays in the past.
 * No one will time travel, as the characters are from that period.
 * Dan Povenmire and Swampy Marsh make a appearance in this episode, in stop-motion.
 * This is the first episode where, for most of the episode, the characters don't speak English.
 * There is a caveman version of the Quirky Worky Song.
 * This episode may have explained how Conk ended up frozen in a 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. (The theory is that the ice age caused a great wall of ice to slowly travel across the world.)
 * This is the first episode to show Gretchen and Adyson without glasses and a hairband respectively.
 * First time Katie is seen with loose hair.
 * When Can-tok runs through the bushes, her hair is briefly changed to the way Candace's hair looks.
 * 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.

Production Information

 * Description of the video:
 * This video shows exactly what it's like working on Phineas and Ferb. It's 8 O'Clock at night, and Celeste, Martin and I are recording a demo for a Caveman version of Gitchee Gitchee Goo for an upcoming episode.
 * A sneak peek of this episode was shown on July 22, 2011 at the San Diego Comic Con.
 * This episode was aired in Disney Channel On Demand on January 6, 2012.

International Premieres

 * November 5, 2011 (Channel 13 Chile)
 * November 24, 2011 (Disney Channel India)
 * November 19, 2011 (Seven Network Australia)
 * November 23, 2011 (Disney XD The Netherlands)
 * December 19, 2011 (Disney Channel Hong Kong)
 * January 27, 2012 (Family Channel)
 * February 23, 2012 (Disney Channel Brazil and Latin America)
 * February 29, 2012 (Disney Channel Asia)
 * March 24, 2012 (Disney XD Spain)

Errors

 * It is unknown how Conk's foot get stuck inside the ice if no one touched him.
 * In some scenes, Gretchen is not wearing her glasses when Roger and Carl 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.

Continuity

 * This is the fourth time cave-people are seen. Previously were in "Boyfriend From 27,000 B.C.", "It's About Time!", and "Rollercoaster: The Musical!".
 * Isabella expresses annoyance with others use of her catchphrase again ("Out of Toon", "Phineas and Ferb Christmas Vacation!", "Suddenly Suzy").
 * During the photo animation scene, the Perry the Inaction Figure was seen. ("Toy to the World")
 * Conk reappears ("Boyfriend From 27,000 B.C.").
 * Second time a live-action character is used, first was Ashley Tisdale in "Lights, Candace, Action!".
 * Bobbi Fabulous makes a cameo, again as a hair dresser ("Dude, We're Getting the Band Back Together").
 * The SUV that was in "Finding Mary McGuffin" and "The Secret of Success" appeared on a stone-print.
 * Second time Phineas/Phinabunk and Ferb/Gerb make a new language ("Ferb Latin").
 * Second time Jeremy and Candace look like cave-people ("Boyfriend From 27,000 B.C.").
 * Second time Doofenshmirtz brings up evolution. ("Phineas and Ferb Hawaiian Vacation")

Allusions

 * The Flinstones - Isabeluk having a bone in her hair is most likely a reference to Wilma and Pebbles Flintstone, as they both have bones in their hair. All human characters walk around barefoot, much like most characters from The Flintstones. The Tri-Stone Area is also a parody of Bedrock.
 * Daffy Duck and the Dinosaur - The Tri-Stone Area is similar to the 1939 public domain Daffy Duck cartoon.
 * Quest for Fire - This 1981 film featured cavemen talking in their own language.
 * Caddyshack - Carl Spackler in Caddyshack claims to have golfed with the Dalai Lama. He says the Lama told him "Gunga galunga... gunga, gunga-lagunga" which sounds very similar to how Caveman Monogram talks.
 * Spongebob Squarepants - This episode is quite similar in structure and theme to the episode Ugh, which includes real-life segments and presents the caveman counterparts of the regular characters, caveman language and the discovery of fire. SpongeBob was SpongeGar & Patrick was Patar.