ActingPaul O'BrienPaul O'Brien is an actor.Known forPerson of Interest2011ACTIONStar Trek: Voyager1995SCI-FILaw & Order: Criminal Intent2001DRAMAER1994DRAMAFull filmographyPerson of Interest2011ACTIONStar Trek: Voyager1995SCI-FILaw & Order: Criminal Intent2001DRAMAER1994DRAMAElementary2012DRAMAThe Practice1997DRAMAAngel1999SCI-FILaw & Order: Organized Crime2021CRIMESearch Party2016COMEDYWhat's the Worst That Could Happen?2001ACTIONShirley2020DRAMA