 " Peter 's Progress " is the 16th episode and the season finale of the seventh season of Family Guy . It originally aired on Fox in the United States on May 17 , 2009 . In the episode , a psychic reads Peter 's palms and discovers he led a fascinating past life as Griffin Peterson , a dignified gentleman in 17th @-@ century New England .
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"Family Guy"
"Family Guy" is the 16th episode and the season finale of the seventh season of Family Guy. It originally aired on Fox in the United States on May 17, 2009. In the episode