(S21E13) You'll have to forgive me when I admit that I'm not familiar with all of the instances of the Simpson family history that have been presented over the years, as I've not caught all 453 episodes prior to this one. I also suspect that Lisa's journey across the attic featured costumes and memorabilia from across the past 20 years, which would have been a nice touch for that lackluster anniversary 450th episode that featured Krusty, for some reason. Bonus points to anyone who can recognize every artifact shown.

Speaking of Krusty, he showed up in the flashback installments of this nostalgic look back at the Simpsons in the era of slavery. It was but one of a few awkwardly forced historical cameos in what was otherwise a rather solid episode.

Plus, we learned where donuts originated from, and knowledge is power!

Do you think the Simpsons just became 1/64th black in the hopes that the NAACP would stop criticizing network television for how incredibly white it's gotten the past several years? It's certainly an interesting revelation about the family, while not changing anything really about them. Grandpa's explanation for the deceit over the years was simple enough. His generation was racist.

There were some great comedic moments in tonight's episode, notably Ralph Wiggum's presentation for Black History Month, and the herd of Obamas backstage waiting for their moment to shine. The early sequence with the stump wound up more surreal than funny, when Groundskeeper Willie filled the resultant hole with water and actually caught a fish in it. Nevertheless, those little background bits add layers and humor to otherwise more straightforward scenes.

Lisa's quest to find one honorable person in the Simpsons lineage gave rise to one question that's always bothered me about family trees. If she was having trouble finding an honorable ancestor on her father's side, why not look to Marge's family. It's just as rich and storied as Homer's, I'm sure. We're still so paternally oriented when we think of our ancestry, even though it's only half of the equation that makes each of us. Then again, Marge did admit she was French, so -- ("Oh no you didn't!" - "Oh yes, I did!")

It was a nice switch to have Eliza Simpson truly turn out to be the disappointment most Simpsons are, while her mother Mabel turned out to be the true hero. She also turned out to be the true ancestors to the modern-day Simpsons, with the former slave Virgil that Eliza failed to free; they took the Simpsons name because Virgil didn't have a last name.

That means, though, that Hiram Simpson, who supposedly lived in Springfield, is not related to the current Simpsons. If the descendants are still in town, they're a rogue line of Simpsons, though it's possible their name has changed over the years. Well, would you look at that. How's all this for overthinking a cartoon series? They could just as easily pretend the events of this episode never happened by the time next week rolls around.

[Find more family history with clips and full episodes of 'The Simpsons' over at SlashControl.]