One snowy day in Springfield, Lisa informs Bart that she and Maggie share a bond that Bart will never understand because he doesn't have a brother, so Bart asks Homer for a baby brother. When Homer denies Bart's request, Bart makes his way to the Springfield Orphanage to find what he thinks he's missing.
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.
The Simpsons S21E08 (“O Brother, Where Bart Thou?”) first aired on December 13, 2009.
In the US, The Simpsons season 21 — 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.
Fans rate The Simpsons S21E08 (“O Brother, Where Bart Thou?”) 8.2/10, which puts it in the great tier for The Simpsons.