Stewie builds a DNA-altering machine that will allow him to remain smart forever, but the invention has the adverse effect and he instead transforms into what he should have always been - an actual baby.
Quest roles:
Steve Callaghan(Mr. Andy (voice)), Jennifer Tilly(Bonnie Swanson (voice)), Alec Sulkin(Self), Rachael MacFarlane(Meg Griffin (singing voice)), Mike Desilets(Italian #1 (voice)), Ralph Garman(Announcer (voice)), Kevin Michael Richardson(Arby's Announcer (voice)), Dee Bradley Baker(Miss Tiggywinkles (voice)), Artie Johann(Baby on Big Wheel (voice)), Robert Wu(Korean General (voice)), Judy Greer((voice)), Brett Gelman(Escape Room Guy (voice))