Journey to the Center of Kenzi

Journey to the Center of Kenzi is the 9th episode of Season 31 on Disney and the 23rd on Nickelodeon. Kenzi accidentally swallows a miniscule time bomb that Doofenshmirtz has sent to destroy Perry. It's up to Phineas, Ferb, and the gang to retrieve the bomb before Kenzi explodes. This episode also has a guest voice actor of Chris Rock, who plays the manager at the bomb factory.

Episode Summary
Doofenshmirtz decides to get a head start on the day's scheme. He creates a miniature time bomb to destroy Perry the Platypus once and for all. He launches the bomb in the direction of the Flynn-Fletcher household. At the house, Phineas and Ferb have invited Isabella, Buford, Baljeet, Bailey, Katherine, and Kenzi over for breakfast. As Kenzi is about to eat a spoonful of her cereal, the time bomb accidentally lands in her spoon and then Kenzi swallows it. The kids finish breakfast and head outside to begin the day's project. Kenzi's stomach begins to act strange so Phineas and Ferb get out their X-Ray glasses and inspect the situation. They see a bomb and decide to go over to the nearest bomb factory to get more information on the bomb. After hearing what it does, Phineas and Ferb do some fast thinking, and the only way to get it out is to go into Kenzi's stomach and get it. So Phineas and Ferb get out their submarine they used to go into Candace and go into Kenzi's body. Buford is fascinated by all the high-tech buttons in the submarine and presses random buttons that interfere with Kenzi's insides. It accidentally cuts her tongue, chops off her uvula, and gives her throat an incredible pain. Buford is scolded and goes into timeout. They finally reach Kenzi's stomach and deactivate the bomb. Kenzi is saved. They come out of Kenzi's mouth and she thanks Phineas and Ferb and their friends for saving her life.

Songs

 * The Time is Now
 * Quirky Worky Song

The "Too Young" Line

 * Bomb Factory Manager: "Say, aren't you kids a bit young to be here, at a dangerous factory like this?"
 * Phineas: "To be honest, yes..."
 * Katherine: "But we're here to try to save our friend, so I say no!"

Ferb's Line
"Buford, go to timeout and think about your recently made choices."

Whatcha' Doin
Norm

Perry's entrance to lair
None, Perry does not appear

Evil Jingle
Doofenshmirtz Evil Incorporated, before hours

Continuity

 * Second time Phineas and Ferb need to go into their friend, the first was in "Journey to the Center of Candace"
 * The X-Ray Glasses are used ("No More Bunny Business")
 * Doofenshmirtz tries to go something at Perry's house ("Hide and Seek")
 * The boys have their friends over at breakfast again ("Jerk de Soiel")
 * Norm asks what Doof is doing again ("Hail Doofania!")

Allusions

 * Nike: Katherine is wearing Pike shoes.