Bats in the Belfry

 Bats in the Belfry is the second half of the 3rd episode of Season 12. It first aired on October 20, 2008 with D.W.'s Stray Netkitten.

Summary
Arthur, D.W., and Buster turn Grandma Thora's attic into a clubhouse until Arthur spots a bat. There's only one thing to do - find garlic! Instead, Arthur's dad builds a bat box.