Season 15 begins with an hour-long crossover with The Simpsons entitled “The Simpsons Guy” In this season, Joe writes a children's book (“The Book of Joe"), Peter and Lois open a cookie store (“Baking Bac"), Stewie becomes pregnant with Brian's baby ("Stewie is Enceinte"), Meg becomes a foot fetish model (“This Little Piggy) and Brian and Stewie take Chris back through time to help him with his history class, with the three ending in chaos on the Titanic!