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 will be a caveman version of Gitchee Gitchee Goo.

Songs

 * Zubadaba

Perry's entrance to his lair
None.

Background 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.
 * The episode starts without an explanation why the story plays in the past.
 * No one will time travel, the characters are from that period.
 * Phineas' caveman version is called Phinebunk, Ferb stays Ferb, Candace is called Canduk and "Mom" is "Magga".

International Premieres

 * October 28, 2011 (Disney XD Germany)

Continuity

 * Fourth time cavepeople are seen. Previously were in "Boyfriend From 27,000 B.C.", "It's About Time!", and "Rollercoaster: The Musical!".

Allusions
The Flintstones: Isabella having a bone in her hair is most likely a reference to Wilma and Pebbles Flintstone, as they both have bones in their hair.

Cast

 * Vincent Martella as Phineas
 * Ashley Tisdale as Candace
 * Thomas Sangster as Ferb
 * Caroline Rhea as Mom
 * Mitchel Musso as Jeremy
 * Dan Povenmire as Dr. Doofenshmirtz
 * Jeff "Swampy" Marsh as Major Monogram
 * Richard O'Brien as Dad
 * Dee Bradley Baker as Perry
 * Alyson Stoner as Isabella