"Baby Not on Board" is the fourth episode in the seventh season of the American animated television series Family Guy. It originally aired on the Fox network in the United States on November 2, 2008. The episode features Stewie (voiced by Seth MacFarlane) after he is accidentally left at home when the Griffins head for the Grand Canyon. The family soon notice his absence, and they rush home; however, Peter (also voiced by MacFarlane) makes it more difficult for his family because of his immature behavior. Meanwhile, Stewie realizes how much he depends on his family while he is alone.