# Peter's job situation
 Peter and the giant chicken (two episodes so far and a third bout has been promised)
 Lois's wealthy Pewterschmidt background
 Chris's interest in drawing, painting
 The evil monkey in Chris's closet
 The old pervert who's interested in Chris
 "Meg does her bird calls" (just two episodes, but still)
 Stewie's brother Bertram
 Brian went to Brown
 Brian's feelings for Lois
 Peter rolled up the window in the General Lee and Brian got smacked up on it
 Stewie teases Brian about his novel
 The Browns' divorce
 Quagmire's job as a pilot
 "Joe had his accident at Christmastime"
 The medical barbershop quartet
 Goldman's Pharmacy was established in 1983

 Name origin  

Does anyone know the origin of the name Peter Griffin?

 Qoutes 

Some of the quotes need checking.  
There are different versions on the web, but some of them are only found in this article, which makes me think they are too different from the original.
Some of the quotes (such as "I am out of shape") aren't really notable without context. theus-X303-