We don't have a biography for John G. Preston yet. Hang in there, or go ahead and contribute one.
Known For
Credits
Cast Credits
Person of Interest (2011)
Guest starring as Admitting Physician
- Episode 4x21: Asylum (Apr 28, 2015) [Co-Star]
Criminal Minds (2005)
Guest starring as Eric Beckford
- Episode 7x20: The Company (Apr 11, 2012) [Co-Star]