Pastor Rick Warren, Rabbi Angela Buchdahl and Sheik Yasir Qadhi are of three different faiths, all with complex family histories that profoundly shaped their religious beliefs. Our research of their roots unearthed a story about the spiritual foundations of this country, an unrelenting struggle to achieve our ideal of religious freedom and tolerance, but also the difficulties sometimes of holding onto one's faith and still feeling like an "authentic" American.

Laurence Fishburne and Sheryl Lee Ralph learn about their family histories.

Actor Ben Affleck discovers his mother's past as a Freedom Rider in 1964, NAACP President Ben Jealous learns how far his great-grandfather would go to keep his family whole, and actress Khandi Alexander learns about her grandfather's death. This episode is not available from pbs because actor Ben Affleck had persuaded Gates to omit information about his slave-owning ancestors. In the investigation, PBS said that producers violated network standards by letting Mr. Affleck have “improper influence” and “by failing to inform PBS or WNET of Mr. Affleck’s efforts to affect program content.”

Henry Louis Gates, Jr. explores the diverse family histories of politicians Paul Ryan, Tulsi Gabbard and Marco Rubio. They each see a shared vision of the great American melting pot reflected in their ancestors’ stories.

Henry Louis Gates, Jr. journeys with Erin Burnett, Amy Carlson and André Leon Talley, three guests from diverse backgrounds, as they meet the ancestors who laid the groundwork for their success.

Exploring the ancestry of chefs José Andrés and Sean Sherman.

Questlove, S. Epatha Merkerson and Ava DuVernay explore the unexpected places where their ancestors were scattered by slavery.

Guests: Amy Schumer and more. Guests who have found fame mining their family stories for comedy learn about ancestors who overcame immense suffering.

Guests: Lewis Black and Roy Wood, Jr. Henry Louis Gates, Jr. provides comedians Lewis Black and Roy Wood, Jr. with accounts of hardship in their family trees which may have led them to each find humor in adversity.

Research into the ancestry of singer Lea Salonga and actress Amanda Seyfried reveals relatives who survived heart-wrenching ordeals.

Ken Burns learns that his Southern ancestors include Confederate soldiers and a slave owner; Anderson Cooper learns that an ancestor on his father's side was killed by one of his slaves; and Anna Deavere Smith learns about her great-grandfather, who was a free black man and former conductor on the Underground Railroad.

Explore the shared Irish ancestry of three powerful social commentators of our times, Bill Maher, Soledad O'Brien, and Bill O'Reilly.

Henry Louis Gates, Jr. retraces the ancestral journeys of David Chang and Raúl Esparza, whose families fled their homelands, leading them to find lost parts of themselves along the way.

Henry Louis Gates, Jr. guides Regina King and Damon Lindelof, the creative forces behind a visionary television series, as they discover that they have more in common than meets the eye.

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.

Exploring the Italian roots of television host Joy Behar and actor Michael Imperioli.

Billie Jean King, Derek Jeter and Rebecca Lobo learn about their family histories. King discovers that her grandmother was an orphan; Derek Jeter investigates his ancestors' lives as slaves; and Lobo finds out that an ancestor was forced to flee Spain because of his democratic ideals.

Chef Tom Colicchio learns the hardships his family endured in Northern Italy; chef Ming Tsai traces his roots back 2,000 years; chef Aarón Sánchez learns his Mexican roots include Spaniards, Africans and Native Americans.

Tony Kushner learns how the Holocaust impacted his ancestors; Carole King delves into the origins of her family name; and Alan Dershowitz discovers that an Hassidic synagogue started by his great-grandfather played a secret role in World War II.

Secrets encoded in their genomes challenge these guests’ ideas about their families’ histories and their identities today. This episode features Jessica Alba, Anderson Cooper, Valerie Jarrett, Governor Deval Patrick and more.

Henry Louis Gates, Jr. shows comedians Seth Meyers, Tig Notaro and Sarah Silverman that their family trees are filled with people whose struggles laid the groundwork for their success. Gates also reveals to each one news of an unexpected DNA cousin.

Actors Melissa McCarthy and Eric Stonestreet retrace their ancestral journeys.

Henry Louis Gates, Jr. explores the roots of actor Jane Lynch and comedian Jim Gaffigan, revealing the Irish American experience through their families.

Henry Louis Gates, Jr. helps John Leguizamo and Lena Waithe retrace the paths of their immigrant ancestors who crossed continents and countries under amazing circumstances.

Singers Ciara and Alanis Morissette examine their family histories.