>> reporter: a and so are the discoveriediscov. >> narrator: we trace greed, envy, love, betrayal, and forgiveness, back, back to the beginning with christiane amanpour. >> out here in this vast emptiness, you can really get a sense of how the idea of one all powerful god first started to spread around the deserts of this region. hello everyone, i'm christiane amanpour and i'd like to invite you on an incredible adventure, a journey back in time where we explore the history and the mysteries of some of the oldest stories ever told. we start in a place that many of us are thinking about this time of year, bethlehem. where the bible tells us that a young woman, named mary, stopped for the night and where shepherds, angels, and kings were led by an especially bright