Peter gets a lasting supply of gasoline for the year, so the family decides to use it to take a road trip to the Grand Canyon. They pack up and hit the road, but it takes them a while to realize that they had forgotten to bring Stewie with them; when they do, they must make their way home posthaste.
Elenco: Mike Henry , Seth MacFarlane , Alex Borstein , Mila Kunis , Seth Green , Adam West , Patrick Warburton , John Viener , Lacey Chabert .