Seth Macfarlane sure has cornered the market on adult cartoon tv shows. First Family Guy hits the sweet spot The Simpsons missed in the early 2000's, then American Dad takes adult animation to an entirely different level. He even has a new show coming out on Fox called Border Town that looks to be classic Macfarlane. Deadline reports TBS is deciding to keep up the streak of loong running shows by renewing American Dad. The network took the show off of Fox's hands last year and it seems their purchase is paying off with the show scoring well in its demographic and time slot. Season 11's new episodes are coming next year with seasons 12 and 13 to follow. Both TBS and Adult Swim air these new episodes so that may also help with ratings.