Air date: 2020-03-06

Runtime: 45 min

Adopted as an infant, Gary L. Stewart always struggled with his identity. After 39 years, the life long search for his biological parents reveals a truth he never could have imagined.

Air date: 2020-03-06

Runtime: 45 min

After learning that his father may have been the Zodiac killer, Gary brings The New York Times best-selling true crime author Susan Mustafa into the fold to help uncover more information about him. Over the next two years, they follow a dark trail filled with unexpected discoveries as Gary attempts to find some closure.

Air date: 2020-03-06

Runtime: 45 min

Gary's story takes a turn when he realizes his book could be a betrayal of his newfound relationship with his biological mother. When Gary goes up against a community of Zodiac fanatics with ulterior motives, he reveals new information that has never been shared.

Air date: 2020-03-06

Runtime: 45 min

Armed with DNA evidence that links his father to the Zodiac killer, Gary forges ahead trying to uncover his truth. Meanwhile, a San Francisco based private investigator digs into Susan and Gary's claims. The questions that have haunted Gary for decades culminate in an unexpected end.