"The Old Man and the Lisa" is the twenty-first episode of "The Simpsons"' eighth season. 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.