Lisa shows Nelson the importance of an education after he drops out of school to be like Mark Zuckerberg. Meanwhile, Homer and Marge get addicted to buying and returning items for bogus reasons to get store credit.

!! Tropes:

* ComicallyMissingThePoint: Chief Wiggum doesn't understand the point of undercover operations.
* ShoutOut: Nelson named his business [[HotWheels "Snot Wheels"]]. If the name alone isn't enough, see his sign's decoration.
* StrangeMindsThinkAlike: When Principal Skinner learned how much Nelson was paying, he ripped his sleeves in order to increase his chances of entering Nelson's payroll. Then a sleeveless Superintendent Chalmers showed up and realized also learned about the wage.