Word that Peter believes a restaurant placemat is a treasure map pits the citizens of Quahog against each other as they search for the prize.
When everyone seems to love the vestigial twin that is growing out of Peter's neck better than him, Peter decides to have him amputated.
Quagmire is excited to meet a woman with a sex drive equal to his own, until she kidnaps him to make him her sex slave; a love triangle forms between Stewie, Brian and Stewie's teddy bear.
Meg spills her lunch on an unstable new classmate; Peter harasses Brian in the nude.
Peter destroys the family's passports while they're in Italy, forcing them to deal with immigration laws.
When Stewie and Brian travel to the 17th century and come close to altering the course of history, Stewie decides to destroy his time machine.
Fame gets to Peter's head when he and Quagmire form a singing/songwriting team.
Peter fills Lois' dad with holiday spirit; Stewie tries to get the only thing he wants for Christmas.
Peter tries to get his mojo back with the help of Quagmire and Joe.
Peter puts his own spin on classic fairytales while telling stories to Stewie.
When Brian's son, now a TV star, comes to town, Brian is more focused on landing a job on the show's writing staff than being a good dad; an accidental shooting leads to a conflict between Quagmire and Peter.
After Peter's mother dies, he befriends her longtime pal, Evelyn (Lauren Bacall); Stewie is upset when he comprehends the reality of death.
Peter and the guys go on a quest to ask God to stop interfering with the outcome of football games.
Chris becomes the heir to Carter's fortune but refuses to accept the money; Peter desperately tries to keep the wealth in the family.
After Peter starts smoking, an advertising executive (Peter Dinklage) asks Peter to be the face of an anti-smoking campaign; Stewie helps Chris with bullies at school.
Stewie gets an STD from Brian; Peter and the guys fight for their booth at The Drunken Clam.
After some quality time with Stewie at the park, Peter accidentally takes the wrong baby home; to prove he's a responsible adult, Peter takes a business trip to Chicago and returns as a more intelligent and classy person.
Chris and Jerome's daughter, Pam (Keke Palmer), run away together when Jerome (Kevin Michael Richardson) forbids their relationship.
Peter brings Meg to college for an interview and introduces her to partying; Brian is prohibited from entering the house when he is sprayed by a skunk.
Cleveland comes back to town but is forbidden to spend time with Peter when Donna and Lois get into an argument.