When he finds out that the winner of an upcoming geography bee will get to be a batboy at the World Series, Cory (Ben Savage) decides to sign up for the competition. In order to prep for this intellectual exercise, Cory changes places with resident "brain" Minkus (Lee Norris), whereupon an amazing metamorphosis transpires: Cory becomes the class nerd, and Minkus actually turns "cool". Meanwhile, Eric (Will Friedle) is mortified when he attends an Aerosmith concert with his girlfriend, only to see his own parents in the audience! ~ Hal Erickson, Rovi