Follows the Major Case Response Team (MCRT) from the Naval Criminal Investigative Service (NCIS), as they get to the bottom of criminal cases connected to Navy and Marine Corps personnel.
Creators
Donald P. Bellisario
Don McGill
Cast
Mark Harmon as NCIS Supervisory Special Agent and Special Agent in Charge Leroy Jethro Gibbs (seasons 1–19)
Sasha Alexander as NCIS Special Agent Caitlin Todd (main role: seasons 1–2; guest: seasons 3 and 9)
Michael Weatherly as NCIS Senior Field Agent Anthony DiNozzo (main: seasons 1–13; guest: season 21)
Pauley Perrette as NCIS Forensic Specialist Abby Sciuto (seasons 1–15)
David McCallum as Dr. Donald "Ducky" Mallard (seasons 1–20; credit only: season 21)
Sean Murray as NCIS Senior Field Agent Timothy McGee (recurring role: season 1, main: season 2–present)
Cote de Pablo as NCIS Special Agent Ziva David (main: seasons 3–11; guest: seasons 3 & 16; recurring: season 17)
Lauren Holly as NCIS Director Jenny Shepard (recurring: season 3; main: seasons 3–5)
Rocky Carroll as NCIS Director Leon Vance (recurring: season 5; main: season 6–present)
Brian Dietzen as Dr. Jimmy Palmer (recurring: seasons 1–5, also starring: seasons 6–9, main: season 10–present)
Emily Wickersham as NCIS Special Agent Eleanor Bishop (guest: season 11; main: seasons 11–18)
Wilmer Valderrama as NCIS Special Agent Nicholas Torres (season 14–present)
Jennifer Esposito as NCIS Special Agent Alexandra Quinn (season 14)
Duane Henry as NCIS International Desk Agent Clayton Reeves (guest: season 13; main: seasons 14–15)
Maria Bello as NCIS Special Agent and Psychologist Dr. Jacqueline Sloane (seasons 15–18)
Diona Reasonover as NCIS Forensic Specialist Kasie Hines (recurring: season 15; main: season 16–present)
Katrina Law as NCIS Special Agent Jessica Knight (guest: season 18; main: season 19–present)
Gary Cole as NCIS Supervisory Special Agent Alden Parker (guest: season 19; season 19–present)
