Description by couchtuner for The Simpsons Season 2 Episode 22 : Mr. Burns is at death’s door and needs a blood transfusion from a donor that has the same very rare blood type that he does. Homer discovers that Bart has the same rare blood type and he sets his sights on receiving a large monetary gift from Mr. Burns, as a thank-you for Bart’s blood. Things become interesting when the only thing the Simpson family receives is a simple thank-you card from Mr. Burns.
Watch It Here : The Simpsons Season 2 Episode 22 Blood Feud