| Mark Harmon | Leroy Jethro Gibbs |
| Michael Weatherly | Anthony DiNozzo |
| Pauley Perrette | Abby Sciuto |
| Sean Murray | Timothy McGee |
| Brian Dietzen | Jimmy Palmer |
| Emily Wickersham | Ellie Bishop |
| Rocky Carroll | Leon Vance |
| David McCallum | Donald Mallard |
| Vik Sahay | Ajay Khan |
| Iman Nazemzadeh | Former NCIS systems administrator Kevin Hussein |
| Erin Allin O'Reilly | Heidi Partridge |
| Indira G. Wilson | FBI Agent P. Filsk |
| Kent Shocknek | Guy Ross |
| David Bickford | Priest |
| Rick Deats | Navy Admiral John McGee |
| Sasha Alexander | Caitlin Todd |
| Troian Bellisario | Sarah McGee |
| Matt Craven | Secretary of the Navy Clayton Jarvis |
| Cote de Pablo | Ziva David |
| Lauren Holly | Jenny Shepard |
| Liza Lapira | Special Agent Michelle Lee |
| Jamey Sheridan | Admiral John McGee |
| Muse Watson | Mike Franks |
| Gregoer Boru | Douglas VonDorothy AKA Krampus |
| Chuck Lines | Lyle Trigget |