n May 12, 2014, Fox renewed Family Guy for a 13th season. The season began with an hour-long crossover with The Simpsons entitled "The Simpsons Guy", guest-starring five of the six main Simpsons voice actors. Other guest stars throughout the season will include Julie Bowen, Liam Neeson, Lea Thompson, Allison Janney, Connie Britton, and Tony Sirico.
In this season, Joe writes a children's book (The Book of Joe), 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, meeting Napoleon Bonaparte along the way (Stewie, Chris, & Brian's Excellent Adventure). There will also be an upcoming Christmas episode with the return of Jesus, with him trying to have sex for the first time (The 2000-Year-Old Virgin), and Peter will beat up guest star Liam Neeson (Kicking Arse).Overview from themoviedb.org