James Joseph O'Neil

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Known For

Credits

Cast Credits

Madam Secretary (2014)
Guest starring as Colonel McKay
The Knick (2014)
Guest starring as Dr. Grindin (2 episodes)
Elementary (2012)
Guest starring as Frye
Person of Interest (2011)
Guest starring as Decker
Numb3rs (2005)
Guest starring as Bob Mazelli
24 (2001)
Guest starring as Halcott
Law & Order: Special Victims Unit (1999)
Guest starring as Chris Hartford
  • Episode 4x13: Rotten (Jan 24, 2003)
Charmed (1998)
Guest starring as Darklighter
  • Episode 6x21: Witch Wars (May 9, 2004) [Co-Star]