High Quality Content by WIKIPEDIA articles! "Blood Feud" is the twenty-second and final episode of The Simpsons` second season. It originally aired on the Fox network in the United States on July 11, 1991. In the episode, Mr. Burns falls ill and desperately needs a blood transfusion. Homer discovers Bart has Burns` rare blood type and urges his son to donate some, promising that they will be handsomely rewarded. However, after receiving the blood, all Burns does is send the family a card. Enraged, Homer writes an insulting reply, but Marge convinces him at the last minute not to send it, although Bart mails it anyway.