Sasha Clements as Katya Miranova, nemesis of Callen and Anna.Vyto Ruginis as Arkady Kolcheck, former KGB Operative, associate of Callen, and Anna's father.Bar Paly as Anatasia 'Anna' Kolcheck, Former ATF Agent and Callen's girlfriend, later fiancée.Kavi Ramachandran Ladnier as Shyla Dahr, NCIS Reserve Agent.Peter Cambor as Nate Getz, NCIS Special Agent and Operational Psychologist.Briana Marin as Aliyah de León, NCIS Supervisory Special Agent.Duncan Campbell as NCIS Special Agent Castor.Elizabeth Bogush as Joelle Taylor, CIA Agent and former girlfriend of Callen.Olesya Rulin as Zasha Gagarin, former Russian spy.LL Cool J as Sam Hanna, NCIS Senior Field Agent, Second in Command.Gerald McRaney as Hollace Kilbride, a retired Admiral and friend of Henrietta Lange, later Operations Manager.Caleb Castille as Devin Roundtree, NCIS Special Agent (Previously FBI Agent).Medalion Rahimi as Fatima Namazi, NCIS Special Agent.Eric Christian Olsen as Marty Deeks, NCIS Investigator (Previously LAPD/NCIS Liaison Officer).Daniela Ruah as Kensi Blye, NCIS Special Agent.
Main article: List of NCIS: Los Angeles characters Main
