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 -.
Guest Cast
Jennifer Tilly
voices Bonnie Swanson
Kevin Michael Richardson
voices Jerome
Artie Johann
voices James Taylor
Judy Greer
voices Bozo's Client
Dee Bradley Baker
voices Gremlin Stewie
Brett Gelman
voices Escape Room Guy
Robert Wu
voices Korean GeneralCast Appearances
Seth MacFarlane
voices Peter Griffin
Seth MacFarlane
voices Stewie Griffin
Seth MacFarlane
voices Brian Griffin
Alex Borstein
voices Lois Griffin
Seth Green
voices Chris Griffin
Mila Kunis
voices Meg Griffin
Mike Henry
voices Cleveland Brown
Patrick Warburton
voices Joe SwansonEpisode Discussion
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