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The Simpsons – Season 21, Episode 13: Full Cast & Crew Aired Feb 21, 2010 Comedy/Animation
When Lisa discovers that her Southern ancestors helped a slave escape to freedom, she presents the story during Black History Month. TV-PG Air Date: Feb 21, 2010 See TV Episode Details

Cast & Crew

All Cast Crew
Dan Castellaneta Homer Jay Simpson, Barney Gumble, Grampa Simpson, Mayor Joe Quimby, Krusty the Klown, Groundskeeper Willie Voice Julie Kavner Marjorie Bouvier Simpson, Patty Bouvier, Selma Bouvier, Grandma Jackie Bouvier Voice Nancy Cartwright Bartholomew Jo-Jo "Bart" Simpson, Nelson Muntz Voice Yeardley Smith Lisa Marie Simpson Voice Hank Azaria Moe Szyslak, Apu Nahasapeemapetilon, Chief Clancy Wiggum, Dr. Nick Riviera Voice Harry Shearer Charles Montgomery Burns, Waylon Smithers, Principal Seymour Skinner, Ned Flanders, Otto Mann, Scratchy, Kent Brockman, Dr. Julius Hibbert, Reverend Timothy Lovejoy Voice Wren T. Brown Virgil Guest Voice Pamela Hayden Milhouse Van Houten Guest Voice Tress MacNeille Dolph Guest Voice Maggie Roswell Miss Hoover Guest Voice Karl Wiedergott Interviewer Guest Voice James L. Brooks Executive Producer Matt Groening Executive Producer Al Jean Executive Producer Raymond S. Persi Director