The Simpsons Season 2 Episode 2

Prematurely bald Homer sees an opportunity to restore his hair with Dimoxinil but it is very expensive and he obtains it via an insurance scam. Seeing him with a full head of hair Burns promotes him to an executive position with an adoring male secretary, Karl,who encourages Homer to bring out his strengths. But when the jealous Smithers discovers the fraud,the effects of the Dimoxinil wear off and Bart breaks the bottle,spilling the rest,it's back to normal for Homer.