Actor · DirectorPaul O'BrienPaul O'Brien is an actor.SocialsIMDbKnown forPerson of InterestJudge Andrew MonahanLaw & OrderOfficer BarnesStar Trek: VoyagerGeralElementaryPaul FontinoShirleyDeanAngelCaptainLaw & Order: Criminal IntentPete WheelerERKicking PatientHenry's CrimeHead Parole Reviewer