America Ferrera learns about her great-grandfather's pivotal role in Honduran history, and seeks a connection to the father she hardly knew.

Singer Josh Groban traces his ancestry to Germany and discovers a relative who was a deacon, music teacher and well-known astronomer.

Actress Angie Harmon discovers an ancestor who gave up his freedom to come to America and fought for independence at a pivotal point in history.

Television personality Julie Chen uncovers a dramatic tale when she sets out for rural China to learn more about her maternal grandfather, who died long before she was born.

Actor Bill Paxton searches his paternal ancestry and uncovers a war hero from a historic battle who shaped politics in the past.

Music artist Melissa Etheridge researches her French roots, discovering a scandalous lawsuit and a relationship entangled with tragedy.

Actor/Producer Sean Hayes searches for the cause of his estranged father's troubled past and uncovers a shocking trail of tragedy and crime that reaches back generations.

Actor Tony Goldwyn researches his maternal ancestry and discovers a heritage of political activism along with a couple who proudly fought for abolition, women's rights and westward expansion.