Hauptdarsteller aktiv Chris O’Donnell (NCIS Special Agent G. Callen) LL Cool J (NCIS Special Agent Sam Hanna) Linda Hunt (OPS Managerin Henrietta „Hetty“ Lange) Daniela Ruah (NCIS Special Agent Kensi Blye) Eric Christian Olsen (LAPD Detective Marty Deeks) Medalion Rahimi (NCIS Special Agent Fatima Namazi) Caleb Castille (Special Agent Devin Roundtree) Gerald McRaney (Retired Admiral Hollis Kilbride)Hauptdarsteller inaktiv Adam Jamal Craig (NCIS Junior Special Agent Dominic Vail) Barrett Foa (NCIS Tech Operator Eric Beale) Miguel Ferrer (NCIS Assistant Director Owen Granger) Peter Cambor (NCIS Operational Psychologist Nate Getz) Renée Felice Smith (NCIS Intelligence Analyst Nell Jones)
