Petarded
After winning a game of Trivial Pursuit, Peter is convinced he is a genius. To prove Peter wrong, Brian suggests he take a test of the MacArthur Genius Grant. The test results say that Peter is technically mentally challenged. Peter has no problem abusing this handicap until Lois is injured and the kids are taken away because Peter is not mentally fit for parenting.
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S4 E1
North by North Quahog
Peter and Lois decide to go on a second honeymoon. But when Peter crashes the car, he decides to pose as Mel Gibson to stay in his fancy hotel suite, where they find a copy of a "The Passion of the Christ" sequel. They attempt to destroy the film and end up being chased by two priests who went to retrieve the film.
S4 E2
Fast Times at Buddy Cianci Jr. High
Brian becomes a substitute teacher at Chris' school after his teacher wins the lottery. When Brian is moved to teach a class of troubled kids, Chris falls in love with his new teacher, Mrs. Lockhart, who promises to love Chris only if he kills her husband. When Lois finds out, she and Stewie decide to teach Chris a lesson.
S4 E3
Blind Ambition
After Mort bowls a perfect game, and Quagmire gets a key to the city by performing CPR, Peter notices he has nothing to be proud of. He then attempts to achieve fame by setting the world's record for most nickels swallowed. However, a slight miscalculation leaves him blind with nickel poisoning.
S4 E4
Don't Make Me Over
When Meg gets turned down for a date, she asks her family for support. Lois ends up taking her to the mall, where she gets the ultimate makeover. Meanwhile, Peter tries to start a band with the guys, but when their first gig fails, the family ends up performing. Impressed by Meg's singing, a record producer signs the family, and their travels eventually land them on "Saturday Night Live."