Singers Ciara and Alanis Morissette examine their family histories.

Actors Valerie Bertinelli and Brendan Fraser explore their family histories

Singer Sammy Hagar and actor Ed O'Neill uncover their roots and discover deep family secrets.

Actor Bob Odenkirk and comic Iliza Shlesinger explore their family histories and learn about relatives who took great risks to overcome hardships.

Henry Louis Gates, Jr. explores the extraordinarily diverse roots of journalist Sunny Hostin and actor Jesse Williams—telling long-lost stories of African and European ancestry that compel his guests to rethink their own identities.

HenryLouis Gates, Jr. helps musician Dionne Warwick and actor Danielle Brooks break down barriers imposed by the slave system to learn the names of their ancestors who endured unimaginable ordeals but emerged to forge families that thrived.

Comic Tracy Morgan and actor Anthony Ramos, both native New Yorkers, map their family trees.

Henry Louis Gates, Jr. explores the roots of actor Michael Douglas & writer-director Lena Dunham. Both are the children of famous artists, but their family trees contain a cast of fascinating characters whose lives were forgotten—until now.

Henry Louis Gates, Jr. solves mysteries for 3 everyday Americans chosen to be guests.