Peter thinks he's suddenly become brilliant after winning a game of "Trivial Pursuit", little realizing that Lois had merely let him win. To let Peter down easy, Brian the dog arranges for his master to get an IQ test. As a result, Peter is classified as "retarded"--and he intends to take full advantage of the fact that the world gives a special pass to Special People. In the same spirit of taste and delicacy, this episode offers a musical performance by a singing tumor, and a knee-slapping reference to the bombing of Hiroshima.
~ Hal Erickson, All Movie Guide