Operation Crumb Cake/Mandace - S4-E21
Other mistake: When the reverse-inator zaps Phineas, and he takes apart the sculpture, it is impossible that he took down the whole thing alone, because he didn't build it alone.
Phineas and Ferb (2007)
1 mistake in Operation Crumb Cake/Mandace
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The Fast and The Phineas - S1-E4
Trivia: Jeremy mentioned that one of the cars' name was Billy Ray, making a reference to Hannah Montana , which country singer Billy Ray Cyrus stars in Mitchell Musso who played the voice of Jeremy also stars in Hannah Montana.
Answer: "One boring day, Phineas recognizes an important truth; Summer vacation will end, and the teachers will want to know what they did on their summer vacation. And with these two kids, it has to be something extravagant..."http://uk.imdb.com/title/tt0852863/.
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