ActingRick ZahnRick Zahn is an American film and television actor.Known forPerson of Interest2011ACTIONThe Blacklist2013DRAMAFBI2018CRIMEIt's Always Sunny in Philadelphia2005COMEDYFull filmographyPerson of Interest2011ACTIONThe Blacklist2013DRAMAFBI2018CRIMEIt's Always Sunny in Philadelphia2005COMEDYThird Watch1999DRAMAThe Mysteries of Laura2014MYSTERYPremium Rush2012CRIMEChuck2017DRAMA
