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Shaggy and Scooby-Doo Get a Clue Season 2 Episode 10

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.

Episode Title: Don't Get a Big Head

Air Date: 2008-02-16