S1, E4: When Quack comes down with a case of the sneezes right in the middle of a game of the Knights of Pop-a-lot, gallant Sir Zack heads off on a quest to gather the ingredients for a magical cure. / When Zack gets a high-tech boomerang, he forgets his buddy Quack in favor of his new toy. But when Quack gets in trouble, Zack realizes his friendship with Quack is what’s really important.