Yug Ylimaf
Brian abuses Stewie's time machine and causes reality to run in reverse. So the two must work together to set things right before Stewie is "unborn."

Cast
Seth MacFarlanePeter Griffin / Brian Griffin / Stewie Griffin / Glenn Quagmire (voice)
Alex BorsteinLois Griffin / Tricia Takanawa / Loretta Brown / Barbara Pewterschmidt (voice)
Mila KunisMeg Griffin (voice)
Seth GreenChris Griffin (voice)
Patrick WarburtonJoe Swanson (voice)
Arif ZahirCleveland Brown (voice)Family Guy on tvt

