Aqua Teen Hunger Force
Season 1 Episode 14: Dumber Days
Air Date: 2002-12-01
Meatwad's brain is discovered to be nothing more than a toy with a jingle bell in it. After Meatwad goes through a brief depression, Carl gets him a new live brain against Frylock's will. With his new brain, Meatwad begins to grow smarter and larger.
