Pops' Pops' Pops

S1, E24: In the season finale Jack and Diane look for clues about their roots for their class assignment a history of the Johnson family. But when they can't find anything out about the family's past Pops comes to the rescue with the colorful story of how his great-great grandfather Drex Johnson bet the future of the Johnson family against a ruthless gangster Elroy Savoy during the 1920s Harlem Renaissance.