Singer Kelly Clarkson explores her lineage and uncovers an ancestor deeply rooted in American history; she comes face-to-face with her 3x great grandfather's wartime bravery and sacrifice.

In the Season 7 premiere, Ginnifer Goodwin hopes to connect her father with the grandparents he never knew, and uncovers a dark side of her family tree that includes instability and drug addiction.

The country music superstar uncovers his father's heritage among the Founding Fathers.

Sarah Jessica Parker is a celebrated icon in film and television as well as fashion, who recently served as a producer and reprised her Emmy Award-winning role as Carrie Bradshaw for the screen adaptation of the hit HBO series "Sex and the City." The actress took an emotional journey from coast to coast in search of her family's roots, crossing paths with the California Gold Rush and the Salem Witch Trials.

Lisa Kudrow journeys to the small Jewish town of Ilya where she discovers how her great-grandmother died in the Holocaust. Yet, Lisa finds hope when she uncovers a 60-year old family mystery.

Brooke learns a tragic secret about her grandmother and then discovers a connection to royalty through her paternal roots.

Vanessa Williams sets out on a journey to find out if her ancestors were also trailblazers.

Courteney Cox traces her maternal line back to ambitious and ruthless relatives who plotted and murdered their way to power in medieval times; and she's shocked to discover an ancestor who's one of European history's most famous characters

Actress Hilary Duff uncovers the tale of an ancestor who bravely led an American colony to battle a notorious gang of pirates; she dives centuries-deep into her Scottish roots and is shocked to discover that she descends from a heroic medieval king.

Actress Molly Shannon heads to Ireland in search of her mother’s unknown family tree. She finds desperate ancestors forced to choose between their faith and survival; uncovers a family legacy of bravery; and meets Irish cousins for the first time.

Kim Cattrall travels to her native England to discover what happened to her grandfather, who abandoned his family to poverty when Kim's mother was only eight years old.

Steve Buscemi seeks a compelling story on his mother's side of the family, and finds it in his great-great-grandfather Ralph B. Montgomery.

Valerie Bertinelli goes on the hunt to unlock her family’s mysteries. She tracks down courageous ancestors who suffered through hardship and tragedy, and discovers a royal lineage dating back centuries that she never dreamed possible.

Minnie Driver unravels the deep family secrets her late father kept hidden. She discovers how the ravages of war nearly destroyed him, tracks down a long lost relative for the first time, and forms an unlikely bond with an ancestor she never knew existed.

Megan Mullally explores a shocking pattern of dysfunction in her father's line; she finds her two-times great grandmother was bravely defying societal norms in order to fight for her family's survival, while struggling to hang on to her own sanity.

Actress Christina Applegate investigates her paternal grandmother - a stranger to her and her father. Uncovering dramatic details along the way, Christina gains insight into the life and hardships of the woman she and her father loved, but never knew.

Actress Zooey Deschanel searches for rumored abolitionists in her father’s Ouaker family background. Her journey takes her around Pennsylvania where she uncovers, and follows, the story of a remarkable ancestor who sacrificed everything for her beliefs.

Tracing his patriotic roots, Scott Foley finds a relative who risked his life for one of America’s founding fathers, and an ancestor who suffered unspeakably during one of this nation’s darkest times.

Actor John Stamos explores his Greek heritage for the first time and discovers an explosive feud that shattered his grandfather's childhood. He also meets a relative he never knew and hears firsthand about his family's enduring strength.

On his journey to learn more about his paternal roots, Matthew Broderick discovers the heroic story of his grandfather during World War I and finds the final resting place of his great-great-grandfather who fought in the Civil War.

Lionel Richie sets out to unlock the mystery of the man his beloved grandmother never spoke about - her father, John Louis Brown.

In memory of his late father, actor Chris O’Donnell investigates the paternal side of his family and finds ancestors on the frontlines of American history. Chris explores a patriotic legacy and a family devotion that extends deeper than he ever imagined.

Motown legend and icon, Smokey Robinson tracks down a grandfather tangled in a swirl of controversy and connects to a relative's familiar struggle with oppression while coming face to face with the gruesome history he knew was inevitable.

Actress Liv Tyler unravels the mystery of her father Steven Tyler’s maternal family line, uncovering ancestors who took part in famous American battles. She also learns the shocking truths that will change the way she sees herself, and her family, forever.

Jon Cryer's journey takes him from America to Scotland as he uncovers the dramatic tale of an ancestor who survived a catastrophic battle, endured horrific conditions as a prisoner of war, and was forced to come to America as an indentured servant.