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Where to watch "The Most Dangerous Animal of All"
![](https://image.tmdb.org/t/p/w1280/hMRhGPze1CaakQ5OI7cHlCD7X5b.jpg)
4. The Truth
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Armed with DNA evidence that links his father to the Zodiac killer, Gary forges ahead to uncover his truth. A San Francisco-based private investigator digs into the claims. The questions that have haunted Gary for decades culminate in an unexpected end.
![](https://image.tmdb.org/t/p/w1280/iw0YZebBa4rKNooE59IOxTWRFtQ.jpg)
3. The Discovery
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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.
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2. The Search
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After learning that his father may have been the Zodiac killer, Gary enlists The New York Times best-selling true crime author Susan Mustafa 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.
![](https://image.tmdb.org/t/p/w1280/uBfm0zJWAZBLWiAesZaJX34ZAkg.jpg)
1. My Identity
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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.