War of the Worms: Brain is always taking the fun out of Fern's storytelling by correcting her facts. She decides to teach him a lesson by spinning a tall tale that he can't help but believe. But things gets out of hand, when Fern convinces Brain that there really are giant worms attacking Elwood City! / I Owe You One-Buster's always asking Arthur for favors. One day he worries at the thought of having to repay them all at once, so Buster goes on a favor-repaying frenzy, helping everyone whom Arthur owes a favor to in hopes of getting himself out of this "favor debt." But is Buster forgetting the real meaning of friendship?

Originally released by PBS, 2009. Streaming video file encoded with permission for digital streaming by Infobase on June 19, 2018.

War of the Worms / I Owe You One (26:31); .