After a field trip to the desert, Lisa discovers that the desert water makes creatures get along. Grandpa Abe is kicked out of the retirement center and moves in with The Simpsons, where Homer tests the desert water on him, and his crankiness is cured instantly. The water is turned into a drug, but after it's sold in the black market, there are side effects.
Comments
Worst episode ever!
Probably one of the worst Simpson episode for me.