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.

Main Cast

Seth MacFarlane (Peter Griffin / Brian Griffin / Stewie Griffin / Glenn Quagmire / Tom Tucker (voice))
Alex Borstein (Lois Griffin / Tricia Takanawa / Loretta Brown / Barbara Pewterschmidt (voice))
Mila Kunis (Meg Griffin (voice))
Seth Green (Chris Griffin (voice))
Patrick Warburton (Joe Swanson (voice))
Arif Zahir (Cleveland Brown (voice))

Guest Stars

Brett Gelman (Escape Room Guy (voice))
Mike Desilets ((voice))
Judy Greer (Bozo's Client / Sylvester Stallone's Assistant (voice))
Robert Wu (Korean General (voice))
Artie Johann (James Taylor (voice))
Steve Callaghan (Audience Member / Target Employee (voice))
Dee Bradley Baker (Gremlin Stewie (voice))
Ralph Garman (Man (voice))
Rachael MacFarlane (Waitress (voice))
Alec Sulkin ((voice))
Kevin Michael Richardson (Jerome (voice))
Jennifer Tilly (Bonnie Swanson (voice))

Family Guy

S18E15 — Baby Stewie

Overview

Main Cast

Guest Stars

Crew

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