Tina Fey, George Stephanopoulos and David Sedaris, three quintessential voices in American life, descend from ancestors that were part of the wave of Greek immigrants that flooded America’s shores in the early decades of the 20th century.

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.