# List of NCIS characters

NCIS is an American police procedural television series, revolving around a fictional team of special agents from the Naval Criminal Investigative Service, which investigates crimes involving the U.S. Navy and Marine Corps. The series was created by Donald P. Bellisario and Don McGill as a backdoor pilot with the season eight episodes "Ice Queen" and "Meltdown" of JAG. The series premiered on September 23, 2003, featuring an ensemble cast, which has included: Mark Harmon, Sasha Alexander, Michael Weatherly, Pauley Perrette, David McCallum, Sean Murray, Cote de Pablo, Lauren Holly, Rocky Carroll, Brian Dietzen, Emily Wickersham, Wilmer Valderrama, Jennifer Esposito, Duane Henry, Maria Bello, Diona Reasonover, Katrina Law, and Gary Cole.

## Overview

| Character | Portrayed by | Season | Season | Season | Season | Season | Season | Season | Season | Season | Season | Season | Season | Season | Season | Season | Season | Season | Season | Season | Season | Season | Season |
| Character | Portrayed by | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 |
| Leroy Jethro Gibbs | Mark Harmon | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Does not appear | Does not appear | Does not appear |
| Caitlin "Kate" Todd | Sasha Alexander | Main | Main | Guest | Does not appear | Does not appear | Does not appear | Does not appear | Guest | Guest | Does not appear | Does not appear | Guest | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear |
| Anthony "Tony" DiNozzo Jr. | Michael Weatherly | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Guest | Does not appear |
| Abigail "Abby" Sciuto | Pauley Perrette | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear |
| Donald "Ducky" Mallard | David McCallum | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Does not appear | Does not appear |
| Timothy "Tim" McGee | Sean Murray | Recurring | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main |
| Ziva David | Cote de Pablo | Does not appear | Does not appear | Main | Main | Main | Main | Main | Main | Main | Main | Main | Does not appear | Does not appear | Does not appear | Does not appear | Guest | Recurring | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear |
| Jenny Shepard | Lauren Holly | Does not appear | Does not appear | Main | Main | Main | Does not appear | Does not appear | Does not appear | Guest | Does not appear | Does not appear | Guest | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear |
| Leon Vance | Rocky Carroll | Does not appear | Does not appear | Does not appear | Does not appear | Recurring | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main |
| James "Jimmy" Palmer | Brian Dietzen | Recurring | Recurring | Recurring | Recurring | Recurring | Recurring | Recurring | Recurring | Recurring | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main | Main |
| Eleanor "Ellie" Bishop | Emily Wickersham | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Main | Main | Main | Main | Main | Main | Main | Main | Does not appear | Does not appear | Does not appear | Does not appear |
| Nicholas "Nick" Torres | Wilmer Valderrama | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Main | Main | Main | Main | Main | Main | Main | Main | Main |
| Alexandra "Alex" Quinn | Jennifer Esposito | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Main | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear |
| Clayton Reeves | Duane Henry | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Guest | Main | Main | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear |
| Jacqueline Sloane | Maria Bello | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Main | Main | Main | Main | Does not appear | Does not appear | Does not appear | Does not appear |
| Kasie Hines | Diona Reasonover | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Recurring | Main | Main | Main | Main | Main | Main | Main |
| Jessica "Jess" Knight | Katrina Law | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Guest | Main | Main | Main | Main |
| Alden Parker | Gary Cole | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Does not appear | Main | Main | Main | Main |