Actor · DirectorMarcus GiamattiOctober 3, 1961(62 years old)New Haven - Connecticut - USAMarcus Giamatti is an American actor, best known for being a regular member of the cast of the CBS drama series Judging Amy. He is the younger brother of actor Paul Giamatti.SocialsIMDbWebsiteKnown forHouseJeffrey KeenerThe X-FilesJohn GillnitzCriminal MindsDr. Barry LandmanBonesForrest WakefieldThe MentalistGabriel FanningNCISVictor TillmanCSI: Crime Scene InvestigationChevy CigsMonkJohn KeyesRevengeDr. Ray ClemonsPirates of Silicon ValleyDan KottkeNCIS: Los AngelesCIA Agent Michael SnyderBlue BloodsGerry Gertz