oe and Brian are thrilled at the return of Grandpa Hackett, but Helen isn't so sure he's who he claims to be. "Jack Hackett" turns out to be a friend of their dads from his days in the mental hospital, who just wanted to feel like part of the Hackett's family. Meanwhile, Antonio refuses to continue a chain letter, which everyone else gets and passes along. He begins to suffer for it. While everyone else has good luck.