"The Most Dangerous Animal of All" is a four-part documentary series that explores one man's search for the father who abandoned him,only to uncover the worst: he believes his father is the Zodiac Killer, one of the most infamous serial killers in American history. The series is an honest depiction of true life and true crime unexpectedly merging to upend one man's understanding of his own identity.
Provided with DNA evidence that connects his father to the Zodiac killer, Gary forges ahead to uncover his truth and the questions that have tormented him for decades come to a head in a surprising end.
Gary's tale takes a turn when he sees his novel could be a betrayal of his new relationship with his true mom and when he faces a group of Zodiac fanatics with ulterior motives, he shows new details that have never been shared.
Learning that his father may have been the Zodiac killer, Gary brings The New York Times best-selling true crime author Susan Mustafa in to help uncover more information about him.
Adopted as a baby, Gary Stewart always fought with his identity and after 39 years, the search for his biological parents shows a truth he could not have imagined.