Could we all be descendants of an Adam-like ancestor? And if he existed, who was he, where did he live, and what did he look like? This program uses sophisticated DNA testing methods to, in effect, trace humanity’s family tree. Guided by renowned geneticist Dr. Spencer Wells, viewers learn about the primary tool that propels this quest for a common ancestor—the Y chromosome, which is transmitted through family lines from father to son. Focusing on Africa, the program posits the existence of a patriarchal figure who lived around 60,000 years ago and whose chromosomal characteristics may be shared, at least in part, by every man alive today. Intriguing conclusions about famous historical figures are also featured. A National Geographic Production. (52 minutes)