Host Henry Louis Gates, Jr. helps actor Andy Samberg and author George R. R. Martin answer some family mysteries when DNA detective work uncovers new branches of their family trees. The DNA analysis upends family history and reveals new relatives.

Host Henry Louis Gates, Jr. shows journalists Christiane Amanpour, Ann Curry and Lisa Ling that the stories within their own family trees are every bit as compelling as the news stories they have been covering for the world.

Henry Louis Gates, Jr. explores with Marisa Tomei, Sheryl Sandberg and Kal Penn the tremendous challenges faced by their immigrant forebears. From Italy, Russia and India to America, their histories show success could take generations to achieve.

Host Henry Louis Gates, Jr. delves deep into the roots of two African American guests, actor S. Epatha Merkerson and athlete and television personality Michael Strahan. Both discover unexpected stories that challenge assumptions about black history.

Host 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. 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. shares the family histories of director Alejandro G. Inarritu, iconoclastic performance artist Marina Abramovic and painter Kehinde Wiley. These visionary artists find their identities challenged -- and affirmed.

Radio host Joe Madison receives startling family news, and series host Henry Louis Gates, Jr. learns his own DNA story. Also features the "Finding Your Roots: The Seedlings" STEM Camp, with science and history inspiring the next generation.

Discover how Neil Patrick Harris, Gloria Steinem and Sandra Cisneros are connected to pioneers who broke new ground and paved the way for their modern-day descendants to continue shaping our culture.

Discover how Neil Patrick Harris, Gloria Steinem and Sandra Cisneros are connected to pioneers who broke new ground and paved the way for their modern-day descendants to continue shaping our culture.

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.

Political organizer Donna Brazile, actor Ty Burrell and artist Kara Walker learn how the legacy of slavery has shaped their identities.

Exploring the shared Irish ancestry of Soledad O'Brien, Bill O'Reilly and Bill Maher.