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

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

Host Henry Louis Gates, Jr. explores the family stories of filmmaker Michael Moore and actors Laura Linney and Chloe Sevigny -- three people whose distant ancestors overcame great hardships in ways that resonate with their lives today.

Host Henry Louis Gates, Jr. explores the family stories of filmmaker Michael Moore and actors Laura Linney and Chloe Sevigny -- three people whose distant ancestors overcame great hardships in ways that resonate with their lives today.

Bryant Gumbel, Tonya Lewis-Lee and Suzanne Malveaux discover a tapestry of the unexpected in their ancestry, revealing slaves and free people of color, Civil War legacies and forgotten European origins. (Part 6 of 10)

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

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

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

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

Discover how actress Julianna Marguiles, author Azar Nafisi and chef Lidia Bastianich are bound together by their ancestors' singular and deeply human desire to preserve their most cherished traditions.

Host Henry Louis Gates, Jr. explores the family stories of filmmaker Michael Moore and actors Laura Linney and Chloe Sevigny -- three people whose distant ancestors overcame great hardships in ways that resonate with their lives today.

Discover how actress Julianna Marguiles, author Azar Nafisi and chef Lidia Bastianich are bound together by their ancestors' singular and deeply human desire to preserve their most cherished traditions.

Host Henry Louis Gates, Jr. explores the family stories of filmmaker Michael Moore and actors Laura Linney and Chloe Sevigny -- three people whose distant ancestors overcame great hardships in ways that resonate with their lives today.

Discover how actress Julianna Marguiles, author Azar Nafisi and chef Lidia Bastianich are bound together by their ancestors' singular and deeply human desire to preserve their most cherished traditions.

Host Henry Louis Gates, Jr. explores the family stories of filmmaker Michael Moore and actors Laura Linney and Chloe Sevigny -- three people whose distant ancestors overcame great hardships in ways that resonate with their lives today.

Discover how actress Julianna Marguiles, author Azar Nafisi and chef Lidia Bastianich are bound together by their ancestors' singular and deeply human desire to preserve their most cherished traditions.

Host Henry Louis Gates, Jr. explores the family stories of filmmaker Michael Moore and actors Laura Linney and Chloe Sevigny -- three people whose distant ancestors overcame great hardships in ways that resonate with their lives today.

Comedian Larry David and politician Bernie Sanders discover they have more in common than they thought as they trace their roots from 1940s Brooklyn back to Jewish communities in Eastern Europe.

Comedian Larry David and politician Bernie Sanders discover they have more in common than they thought as they trace their roots from 1940s Brooklyn back to Jewish communities in Eastern Europe.

Comedian Larry David and politician Bernie Sanders discover they have more in common than they thought as they trace their roots from 1940s Brooklyn back to Jewish communities in Eastern Europe.

Comedian Larry David and politician Bernie Sanders discover they have more in common than they thought as they trace their roots from 1940s Brooklyn back to Jewish communities in Eastern Europe.

Actors Fred Armisen and Christopher Walken and musician Carly Simon each learn about a grandparent whose real identity and background had been a mystery to them -- redefining how they see themselves.

Actors Fred Armisen and Christopher Walken and musician Carly Simon each learn about a grandparent whose real identity and background had been a mystery to them -- redefining how they see themselves.

Actors Fred Armisen and Christopher Walken and musician Carly Simon each learn about a grandparent whose real identity and background had been a mystery to them -- redefining how they see themselves.

Actors Fred Armisen and Christopher Walken and musician Carly Simon each learn about a grandparent whose real identity and background had been a mystery to them -- redefining how they see themselves.

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

Host Henry Louis Gates, Jr. explores the family stories of filmmaker Michael Moore and actors Laura Linney and Chloe Sevigny -- three people whose distant ancestors overcame great hardships in ways that resonate with their lives today.

Host Henry Louis Gates, Jr. explores the family stories of filmmaker Michael Moore and actors Laura Linney and Chloe Sevigny -- three people whose distant ancestors overcame great hardships in ways that resonate with their lives today.

Comedian Larry David and politician Bernie Sanders discover they have more in common than they thought as they trace their roots from 1940s Brooklyn back to Jewish communities in Eastern Europe.

Actors Fred Armisen and Christopher Walken and musician Carly Simon each learn about a grandparent whose real identity and background had been a mystery to them -- redefining how they see themselves.

Actors Fred Armisen and Christopher Walken and musician Carly Simon each learn about a grandparent whose real identity and background had been a mystery to them -- redefining how they see themselves.

Author Ta-Nehisi Coates, filmmaker Ava DuVernay, and author and activist Janet Mock see their basic assumptions about their families challenged, placing their ancestors - of all colors - into the greater context of black history.

Author Ta-Nehisi Coates, filmmaker Ava DuVernay, and author and activist Janet Mock see their basic assumptions about their families challenged, placing their ancestors - of all colors - into the greater context of black history.