Paul O'Brien is an actor.
Person of Interest
Elementary
Star Trek: Voyager
Angel
ER
Law & Order
Henry's Crime
Law & Order: Criminal Intent
What's the Worst That Could Happen?
Law & Order: Organized Crime
Shirley
Redacted
Soul Man
Search Party
The Practice
Manhattan Romance
The Dangerous Book for Boys
A Case of Deadly Force
OM CITY
Officer Schkolnick
Ronald Corwin, Officer Barnes, Detective Ted Michel
Kicking Patient
Geral
D.A. Peter Thompson
Captain
Pete Wheeler
Officer Overkraut
McCoy's Father
Head Parole Reviewer
Andrew Monahan
Paul Fontino
Paul
Uncle Bob
Frank
Old Guy Joe
Dean
Gus Hanson
