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Meg is recruited as a model for an industry that caters to a certain group of fetishists, while Brian and Stewie hit the road together when the latter decides to see what the world is like outside of preschool.
Stewie and Brian rev up the time machine to help Chris pass his history class, which leads to the three of them getting stuck in the past.
The Griffins go on a road trip and wind up in Springfield where they meet the Simpsons. Stewie becomes fascinated with Bart's pranks, Lois bonds with Marge, Meg is taken under Lisa's wing and Peter argues with Homer over which brand of beer is best - Pawtucket or Duff.