Arthur Loses His Marbles Arthur : Season 6 Episode 19
TV-Y PBS 30m int(0)
Aired: November 26th, 2001 @ 1:30 PM EST on PBS
When Arthur discovers that Grandma Thora is a marbles champion, he trains with her so he can beat all his friends. And though Thora teaches Arthur everything he knows, she doesn't teach him everything she knows.