The Old Man and the Lisa

"The Old Man and the Lisa" is the twenty-first episode of Season 8 and was first aired on April 20, 1997. The episode was written by John Swartzwelder and directed by Mark Kirkland. Bret Hart guest stars as himself.

Mr. Burns loses his vast fortune and turns to Lisa for help in getting it back through environmental means.

Plot
Mr Burns is sitting in his office talking to his lawyers. Unbeknownst to him, his lawyers agree with everything he says in fear of his wrath, going so far as to encourage him while he made bad investments. It's revealed that Mr. Burns has lost all of his money: The bank forecloses on the plant and sells Mr. Burns' house to pro wrestler Bret Hart.

He lives with Waylon Smithers for a short while, then gets put in the Retirement Castle. Soon, Burns begs for the help of Lisa, who had been pestering him (and the rest of the neighborhood) about recycling. She declines, but after patience and irritation, she gives in. On the condition that he will lose his evil manners she helps him, the two start making money recycling cans. After a while Mr. Burns has made enough money to open the Little Lisa Recycling Plant, all made from recycled materials. Lisa is pleased, believing that Mr. Burns has truly changed, until Burns show her 'the best part': He is using people's recycled plastic to create giant six-pack holder nets, 'cleaning the sea' by hauling all the creatures out of it and selling the meat as animal slurry.

Everyone but Lisa in town is apparently brainwashed to recycle. Lisa, being comforted at home, receives a visit from Mr. Burns, who informs her he's selling the Plant for $120 million. He offers 10% to Lisa, but knowing where the money came from, she turns it down.

Homer has four simultaneous heart attacks (thinking she turned down $12,000 dollars). She later corrects him in hospital, saying that 10% would actually be $12 million. Homer suffers another heart attack.