Diddy and LL Cool J appear on the new episode of "Finding Your Roots," a PBS documentary by the scholar Henry Louis Gates, Jr., to learn more about their ancestry.

Diddy's fourth great-grandparents, who lived in Maryland, were free, unlike the majority of blacks in the early 19th century. “It makes me feel kind of conflicted that my family was free and there was so many other families that weren’t…I can’t imagine what it must have felt like for him being locked up and to be innocent,” he said.

LL Cool J met with relatives to watch video of his great-uncle boxing.

On a past episode of "Finding Your Roots," Nas learned that his great-great-great-grandmother Pocahontas was sold for $830. If you're into this sort of history, definitely check out "Finding Your Roots, which airs on PBS on Tuesdays at 8/7c.