Jimmy tries to stop Sheen from getting left back in school by turing his Brain Drain Helmet into a Brain Gain Helmet. However, his plan backfires when Sheen's I.Q. – as well as his head – inflates to a destructive degree. Invention: Brain Gain Helmet
|Jim Cummings||Guest Star|
|Megan Cavanaugh||Guest Star|
|Rob Paulsen||Guest Star|
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