Castles in the Sky

Castles in the Sky is the first half of the 1st episode of Season 9 of Arthur. It first aired on December 27, 2004, along with "Tipping the Scales."

Summary
The Tree House roof collapses, and the kids need to rebuild it. After meeting Frank Gehry at the Sugar Bowl, they each come up with their own ideas, but none of their new designs work for everyone.

Trivia

 * 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."