Mr. Burns is dying of hypohemia, and needs an immediate transfusion of double-O negative blood. Finding out that Bart has the right blood type, Homer volunteers him, confident that Burns will reward him richly. When all Burns sends is a thank-you card, an enraged Homer writes a hate-mail letter. Marge begs him not to mail it, but Bart does it the next morning. Written by
Did You Know?
When the nurse mounts the packet of Bart's blood (appropriately labeled, ''HUMAN BLOOD'') on the stand, it is about four-fifths full. When Smithers says, ''Go ahead'', the packet is completely full. See more
[after reading Homer's insulting letter
Senile, am I? Bony arms, are they? Buck-toothed, is it? Liver spots, did they? Chinless, will you?
Written by Geezer Butler
, Tony Iommi
, Ozzy Osbourne
, and Bill Ward
Performed by Harry Shearer See more