S06E09 Back to the Woods
At a Barry Manilow concert, Peter loses his wallet. However, a mystery culprit has found it and uses Peter's credit cards to steal his identity. Eventually, Peter and Brian determine that the suspect is James Woods, with whom Peter had an earlier run-in (and defeated by locking him in a crate inside a government warehouse). An embittered James is able to obtain a fraudulent identification card and literally takes over Peter's role as head of the household. The Griffins are outraged and want James arrested, but he fools Lt. Swanson into thinking he is Peter and has the real Peter escorted from "his" home. While James tries to establish himself as "Peter" (even going so far as to wearing Peter's clothing), the real Peter and Brian go to a hotel and plot their revenge ... by stealing James' identity in return. After Stewie presents Peter with a phony identification card of his own, he convinces the public that he is James Woods, all the while making rude and inconsiderate remarks to ruin...