Vestigial Peter
After a vestigial twin grows out of Peter's neck, which he names Chip, he eventually starts realizing that people like Chip more than they like him, so Peter has him amputated. However, after Peter gets into trouble, he realizes he needs Chip more than ever.
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More from this season
S12 E1
Finders Keepers
Peter is convinced that a restaurant placemat is a treasure map. Word quickly spreads about the alleged cache, sparking a city-wide search and turning the citizens of Quahog against each other.
S12 E3
Quagmire's Quagmire
Quagmire dates a woman named Sonja, who is just as sexually active as he is, but things take a turn for the worse when she kidnaps him to be her sex slave, so Peter, Joe and Ida must search the seedy back alleys of Quahog to rescue him. In the meantime, Brian, Stewie and Rupert get involved in a most unusual love triangle.
S12 E4
A Fistful of Meg
When Meg spills her lunch on the new kid at school, he makes plans to end her. Meanwhile, Peter keeps harassing Brian in the nude until it reaches the breaking point.
S12 E5
Boopa-Dee Bappa-Dee
The Griffins go to Italy and are faced with annoying immigration laws after Peter destroys their passports.