Will the truth about his father lead him to the Zodiac Killer? Watch the OFFICIAL TRAILER for The Most Dangerous Animal of All, the first-ever FX Documentaries series. Subscribe now for more The Most Dangerous Animal of All clips: http://bit.ly/SubscribeFX Based on The New York Times best-selling book of the same name, The Most Dangerous Animal of All is a four-part documentary series on FX 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. Watch The Most Dangerous Animal of All Season 1 Videos: http://bit.ly/FXDocumentaries Like FX Documentaries on Facebook: https://www.facebook.com/FXDocs/ Follow FX Documentaries on Twitter: https://twitter.com/fxdocs Follow FX Documentaries on Instagram: https://www.instagram.com/fxdocumentaries/ Like FX on Facebook: http://bit.ly/FXNetworksFacebook Follow FX on Twitter: http://bit.ly/FXNetworksTW Follow FX on Instagram: http://bit.ly/FXNetworksInstagram The Most Dangerous Animal of All | Official Trailer [HD] | FX https://www.youtube.com/user/FXNetworks