"The Old Man and the Lisa" is the twenty-first episode of the eighth season of the American animated television series The Simpsons. It first aired on the Fox network in the United States on April 20, 1997. In the episode, Mr. Burns goes bankrupt and asks Lisa to help him get rich again. She agrees on the condition that he change his evil ways. They earn money by recycling cans and soon Burns has enough money to start his own recycling plant. Lisa is aghast when she learns the plant makes a slurry from liquefied sea creatures. When Burns sells the plant to a company that makes fish sticks, he offers Lisa 10 percent of his profits, but she declines for ethical reasons.

The eighth season of the American animated television series The Simpsons originally aired on the Fox network between October 27, 1996, and May 18, 1997, beginning with "Treehouse of Horror VII". The showrunners for the eighth production season were Bill Oakley and Josh Weinstein, while the season was produced by Gracie Films and 20th Century Fox Television. The broadcast season contained two episodes with 3F-series production codes, indicating that were hold-over episodes from the seventh production season, and two episodes with 3G-series production codes, which have never been explicitly confirmed to be part of any specific production season