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troperville

Peter and Lois invite their friends to a game night. While playing Trivial Pursuit, Lois switches Peter�s question cards with those from the preschool edition so he can feel smarter and when he wins, he thinks he�s a certified genius. His new attitude gets on everyone�s nerves and Brian tells him to take the MacArthur test to prove he�s a genius. Peter takes the test and the results say that he�s not a genius, but in fact, he�s mentally retarded. Peter begins feeling like an idiot for having special needs, but when he accidentally runs over Tom Tucker and he doesn't press any charges because of Peter�s condition, Peter thinks he can get away with anything and used his condition to do anything he wants without retribution. When he enters a fast food restaurant, he tries to steal the kitchen�s deep fryer and accidentally spills the hot liquid on Lois.

Lois ends up in the hospital and Peter has his children taken away because he�s mentally unfit to care for them. The kids are now placed under Cleveland�s care, but Peter wants his kids back. He devises a plan to make Cleveland look like a bad father by inviting several prostitutes into his house, but Cleveland and a child services worker don�t fall for it and Peter is sent to court Peter attempts to appeal to the judge to have his kids back, but is denied. As Peter starts to accept that the Griffin family will never be together again, Lois walks in, having fully recovered and has regained custody of the children. Peter is happy to have his family back, as well as the fact that Lois will be smelling like French fries for the next six months.

"Petarded" contains examples of (YMMV goes here):

Bait and Switch: In a Cutaway Gag, when a man in 1945 Hiroshima who got a parking ticket and mud splashed on his asks how his day can get any worse, he sees something falling above him and says "Oh...my...God". He gets attacked by a monkey.
Brick Joke: A Cutaway Gag shows a National Geographic documentary about firetrucks. At the very end, Peter gets attacked by a firetruck.
Department of Child Disservices
Deleted Scene + Bowdlerization: On the DVD version, there's a scene after Peter talks to Joe about what it's like to be disabled (even though Joe is physically disabled while Peter is mentally disabled) where Joe calls everyone to tell them that Peter is retarded (the whole scene is a musical parody of the telephone scene from Bye Bye Birdie). It was edited on FOX because the censors did not like the overuse of the word, "retarded."
Disability as an Excuse for Jerkassery: Peter takes advantage of his mental condition to do anything he wants, like going into the womens' bathroom and announcing "Testicles!" over a restaurant loudspeaker. It comes back to bite him in the ass later when Lois is put in the hospital for grease burns and the kids are taken away to live with Cleveland.
Karma Houdini: Played with, as Peter doesn't get any retribution for his antics because he's legally retarded.
My God, What Have I Done?: Peter after Lois' ends up in the hospital because of his shenanigans.
Precision F-Strike
Brian: YEEEEAH, IN YOUR FUCKING FACE, FUCKWAD!!!
Shout Out
- The number of prostitutes are counted in a manner similar to Sesame Street.
- To cope with his retardation, Peter gets Verne to be his social worker.
- Stewie says Meg clears her sinuses like Felix Unger.
Take That: On Peter's intelligence chart "Retarded" is below "Average" and above "Creationist"
Too Dumb to Live: Peter. Justified in that this episode reveals that Peter is mentally retarded, so all those past times he did stupid things was because of mental retardation and not him being an expy of Homer Simpson (though some Family Guy detractors will still believe this).
What Could Have Been: For the Timer cutaway, the staff wanted Lennie Weinrib, the original voice of Timer to reprise his role. However, his agent said he was too old to do it and and Timer ended up being voiced by Seth MacFarlane.