While their regular teacher, Ms. Garrison, is busy looking for a way to become the man he always intended to be, Cartman is put in charge. Soon after Cartman takes over, the kids' test scores are on the rise. Cartman decides to make a difference by working with some inner-city kids whom no other teacher has been able to reach. Watch "Eek! A Penis!" (ambiguous title, no?) tonight at 10:00 p.m. ET on Comedy Central.

Last week's episode, "Major Boobage," was inspired by the movie Heavy Metal. In blog comments, Nathan said, "All I can truly say is watch this episode like all the other episodes, with an open mind, and you'll enjoy the break from reality. Watch it like a prude and you get the same kind of enjoyment as slamming the door on your hand." What did you think?
Photo courtesy of Comedy Central.