Shaggy & Scooby-Doo Get a Clue!

Season 2, Episode 10

Episode Title: Don't Get a Big Head

Air Date: 2008-02-16

Overview:

Dr. Phibes, tired of being outsmarted by our heroes, revises his nano formula to increase his IQ. It also inflates his head. Now, Shaggy and Scooby must stop him from releasing a gas that will drastically lower the world's intelligence.