The Simpsons - Season 21 - Eps 13: The Color Yellow
When Miss Hoover asks her students to research their family history, Lisa is horrified to discover that most of her ancestors were bad people – a motley crew of horse thieves and deadbeats. But while rummaging through the attic, Lisa happens upon a diary kept by her ancestor, Eliza Simpson. As Eliza’s story unfolds, Lisa learns that her family was part of the Underground Railroad, a group that helped slaves escape to freedom. Eliza recounts liberating a slave named Virgil, but when Lisa presents her findings at school, some of her classmates refute it, leaving Lisa determined to exonerate her family’s name.
About The Simpsons

Title: The Simpsons
First Air Date: 1989-12-17
Last Air Date: 2025-04-13
Status: Returning Series
Rating: 8.016/10 (from 10160 votes)
Language: EN
Seasons: 37
Total Episodes: 785
Network: FOX
Genres: Family, Animation, Comedy
Production Companies: Gracie Films, 20th Century Fox Television, 20th Television Animation, 20th Television
Synopsis
Set in Springfield, the average American town, the show focuses on the antics and everyday adventures of the Simpson family; Homer, Marge, Bart, Lisa and Maggie, as well as a virtual cast of thousands. Since the beginning, the series has been a pop culture icon, attracting hundreds of celebrities to guest star. The show has also made name for itself in its fearless satirical take on politics, media and American life in general.
Cast

Dan Castellaneta
Homer Simpson / Abe Simpson / Barney Gumble / Krusty (voice)

Julie Kavner
Marge Simpson / Patty Bouvier / Selma Bouvier (voice)

Nancy Cartwright
Bart Simpson / Nelson Muntz / Ralph Wiggum (voice)

Yeardley Smith
Lisa Simpson (voice)

Hank Azaria
Moe Szyslak / Chief Wiggum / Apu / Comic Book Guy / Carl (voice)

Harry Shearer
Ned Flanders / Mr. Burns / Smithers / Skinner / Lenny (voice)