Harold, Sid, and Stinky all moon Principal Wartz, but Arnold is blamed, even though he was just an innocent bystander.

Stinky grows a huge pumpkin to enter in a city competition.

Helga tries to separate Arnold from Lila while at the annual Cheese Fair.

After Grandpa tells Arnold that he never got his grade school diploma, Arnold convinces him to come to go back to school at P.S. 118.