When Brian takes the SATs for Meg but doesn't do very well, the family starts to doubt his intelligence; Peter tries to show Brian the upside of being stupid.
Quest roles:
Gary Cole(Principal Shepherd (voice)), Martha MacIsaac(Patty (voice)), Christina Milian(Esther (voice)), Emily Osment(Girl (voice)), Bruce McGill(Lincoln's Cabinet Member (voice)), Chris Diamantopoulos((voice)), Glenn Howerton((voice)), DJ Qualls(Centipede (voice))