[s18e15] Baby Stewie -

In the Family Guy Season 18 episode "Baby Stewie," the titular character accidentally reverts himself into a typical, non-verbal infant while attempting to use a machine to preserve his intellect. Brian initially enjoys the peaceful, normal dynamic but soon misses his sharp-tongued companion and attempts to reverse the process. The episode explores themes of existential dread and the fear of cognitive decline within the Griffin family.