Castles in the Sky

Synopsis
The gang's treehouse collapses, and architect Frank Gehry steps in to help them rebuild—if they can agree on a new design.

Major Roles

 * Arthur
 * Buster
 * Francine
 * Brain
 * Frank Gehry

Minor Roles

 * Muffy
 * Binky
 * Bitzi Baxter

Background

 * Carl Manino
 * Jane Read
 * D.W.
 * George
 * David Read
 * Robert Baxter
 * 
 * Oliver Frensky
 * Neil Lundgren
 * Alex
 * 4th Grade Male Dog
 * Mrs. MacGrady
 * Maria
 * Jenna
 * Fern
 * Mr. Ratburn

Episode connections

 * Buster references his first dinner with Harry from "Bitzi's Beau."
 * The name Frances appears in this episode. It's unclear who Frances is, but his name would be joined by a list of ten other unidentified students' names in the Season 13 episode, "Arthur's Number Nightmare."

Gallery
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Promotional images
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