Acting Don O. Knowlton Biography Don O. Knowlton is known for Monsters (2022), Mindhunter (2017) and Criminal Minds (2005) Directed Bad Assassin 2000 Acting To the Bone Jack 2017 Brutal Doc McCall 2007 Blackwater Valley Exorcism McCall 2006 Say I Do The Best Man 2003 Other Credits Dent Writer 2020 Agent-readable