In an effort to recover his family's lost savings from a poor investment, Homer takes part in a research study as a human test subject. During this experience, he uncovers the surprising reason behind his low intelligence: a crayon that has been stuck in his brain since childhood. Determined to boost his IQ, he opts for its removal, only to find that higher intelligence doesn’t automatically bring him happiness.
Show
The Simpsons
Episode
S12E09
Air Date
Jan 07, 2001
Season 12 Episodes
S12E01
Treehouse of Horror XI
S12E02
A Tale of Two Springfields
S12E03
Insane Clown Poppy
S12E04
Lisa the Tree Hugger
S12E05
Homer vs. Dignity
S12E06
The Computer Wore Menace Shoes
S12E07
The Great Money Caper
S12E08
Skinner's Sense of Snow
S12E09
HOMЯ
S12E10
Pokey Mom
S12E11
Worst Episode Ever
S12E12
Tennis the Menace
S12E13
Day of the Jackanapes
S12E14
New Kids on the Blecch
S12E15
Hungry Hungry Homer
S12E16
Bye Bye Nerdy
S12E17
Simpson Safari
S12E18
Trilogy of Error
S12E19
I'm Goin' to Praiseland
S12E20
Children of a Lesser Clod
S12E21
Simpsons Tall Tales