Mayor West asks Lois's depressed, recently divorced sister to marry him; Peter treats Mayor West like a brother instead of a brother-in-law.
When Mort accidentally steps into a time machine, Stewie and Brian decide to follow him; but when they learn they are in Poland on the day of the Nazi invasion, they have to find their way back home.
When Peter gets a free gas card, the family decides to hit the road on vacation, but they accidentally leave Stewie behind; home alone, Stewie soon runs out of food and diapers, and is forced to take a job.
Man With Two Brians, The: When Brian hurts his back saving Peter, Peter thinks Brian's getting too old, and brings another dog--named New Brian--into the family; and when everyone falls in love with the new pet, Brian leaves home.
After Brian is thrown in jail for drug possession, he decides to launch a campaign to have marijuana legalized; when Mayor West finally passes the law, the entire town of Quahog literally goes to pot.
Stewie is having trouble falling asleep, so Peter decides to read him three fairytales from the Brothers Grimm. As he reads, familiar Quahogians become characters in the stories.
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