Stories of people looking for lost loved ones. Included: a woman who was left in a New York City phone booth two days after she was born; a man who, along with his brother, was abandoned as a baby in a Bronx apartment; and a teenage mother's search for the child she was forced to give away. Also: examining mysteries that still surround the case of adventurer Chris McCandless (1968-92), who was found dead in the Alaskan wilderness.