← Season 23
THE SIMPSONS · SEASON 23 · EPISODE 4

The Simpsons S23E04 Replaceable You

★ 7.4 · GREAT Nov 6, 2011 30 MIN FOX
Still from The Simpsons S23E04: Replaceable You

The episode in brief

BART's science fair project, a mechanical baby seal, outshines Lisa's brainy asteroid model and becomes a popular pet among the retirement home patrons. Meanwhile, Homer gets a new and eager assistant Roz, but when Homer quickly loses his job to her and discovers her evil past, he and Flanders team up to reveal her true dark colors. Blackboard : 'It's November 6th, how come we're not airing a Halloween Show?'.

FAN DESK VERDICT A top-shelf entry. Not quite canon, but you’ll be quoting it all week — the fan desk says don’t skip.

Who’s in it

SERIES REGULARS

Where it sits in the season

TAP A BAR TO JUMP

Where to watch S23E04

US · NOVEMBER 2026
AVAILABILITY IS FOR THE SHOW; NOT EVERY SERVICE CARRIES EVERY EPISODE · LINKS MAY EARN US POPCORN MONEY
7.4
THE FAN VERDICT
Keeper. Goes straight in the rewatch rotation.

Posts & guides about The Simpsons

GUIDE Oct 29, 2026
The Best Halloween Episodes of TV's Greatest Families
→

S23E04 FAQ

When did The Simpsons S23E04 air?

The Simpsons S23E04 (“Replaceable You”) first aired on November 6, 2011.

Where can I watch The Simpsons S23E04?

In the US, The Simpsons season 23 — including this episode — is available on FX, Hulu, Disney+, fuboTV, DirecTV On Demand, Spectrum On Demand, YouTube TV, FOX One Amazon Channel, Hulu on Disney+, Amazon, Fandango at Home, and AppleTV.

Is The Simpsons S23E04 a good episode?

Fans rate The Simpsons S23E04 (“Replaceable You”) 7.4/10, which puts it in the great tier for The Simpsons.