Peter convinces Brian to move in with Jillian. Stewie moves in with them as well to help pay the rent, but he tries to interfere with Brian and Jillian's relationship by throwing Brian a drinking party. Meanwhile, Meg and Chris get jobs at the local convenience store. While Chris and the manager, Carl, talk about their favorite movies, Meg is stuck with all the hard work. She eventually stands up for herself and as a result, gets fired.

When Joe feels that his disability is holding Bonnie back from living a full life, he decides to get a leg transplant. Excited about his new ability to walk, Joe engages in extreme sports, and soon ditches his current friends, for more active ones. Peter and the guys are upset at how Joe is acting and decide to teach him a lesson.

Lois and Peter sail off on a cruise. Jealous that he was left behind, Stewie's matricidal tendencies are rekindled. When Brian challenges him to actually do it, Stewie carries out his diabolical plan.

Presumed dead, Lois returns from the wilderness and names Stewie as her killer. On the look out for Stewie, Joe leads a manhunt around Quahog. Determined to take over the world again, Stewie auditions for the American Idol. Desperate to stop Stewie, Lois realizes what she must do.

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After Quahog is hit by a flood, Meg winds up in the hospital in a coma. When she wakes up and sees a cute med student, they immediately hit it off. Overprotective of his daughter, Peter is determined to drive the med student away. That is until Meg reveals that she is pregnant.

Peter decides to grow a mustache, and after being mistaken for a fireman, ends up lending a hand when a fire breaks out at a local fast food restaurant. The owner gives him unlimited burgers as a thank you, but he eats too many and has a stroke. When Peter recovers, he vows to expose the fast-food company for what it really is, becoming friends with a genetically engineered cow along the way.

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Peter and Lois's marriage hits a bit of a snag. When Brian wins the New England Rising Writer's award, the three of them head to Martha's Vineyard for a nice relaxing vacation. Peter's usual drinking habits take over, and he soon spirals out of control, as does Brian's self restraint, as he soon professes his love for Lois. Peter and Brian test their friendship over the woman of their dreams.

Brian, afraid that he may have lost his last chance at love, searches for a former flame, Tracy. To his surprise, he discovers that he is the father to her son, Dylan. Tracy decides that Brian should raise the boy, and she drops him off at the Griffin's house. When Dylan runs rough-shot in the house, Brian's attitude towards parenting doesn't settle too well with Lois and Peter.

When Peter gets a pet parrot, he begins acting like a pirate. Peter accidentally kills the bird after raising hell through all of Quahog. Meanwhile, when Brian is visiting the vet, Chris falls in love with the intern, Anna.