Actors in both 9-1-1 and NCIS
423 actors have appeared in both 9-1-1 and NCIS, across 651 episodes. The most-credited is Debra Christofferson, Sue Blevins in 9-1-1 and Rita Gregg, Uta in NCIS.
| Actor | In 9-1-1 | In NCIS | Eps | Eps |
|---|---|---|---|---|
| Debra Christofferson | Sue Blevins | Rita Gregg, Uta | 37 | 2 |
| Claudia Christian | Captain Elaine Maynard | Belgian Vsse Officer Louise Moreau | 19 | 1 |
| Scottie Thompson | Suzanne Barker | Jeanne Benoit | 1 | 18 |
| Lou Ferrigno Jr. | Tommy Kinard | Dave Lancellotti | 15 | 1 |
| Connie Jackson | Fatima | Elaine | 1 | 11 |
| Corinne Massiah | May Grant | Ricki Evans | 11 | 1 |
| Kent Shocknek | National News Anchor | ZNN News Anchor Guy Ross | 1 | 11 |
| Danny Nucci | Rick Romero | Gordon Fremont | 10 | 1 |
| J. Claude Deering | Hoyt | Curtis Hubley | 1 | 9 |
| Dee Wallace | Margaret Buckley | Claire Hall | 7 | 1 |
| Gregory Harrison | Phillip Buckley | Navy Captain Roland Ebbakey | 7 | 1 |
| Marco Sanchez | Medical Tower Manager | Alejandro Rivera | 1 | 7 |
| Brian Thompson | Capt. Vincent Gerrard | Master Chief Vince Nutter | 13 | 1 |
| Melinda McGraw | Bonnie Sheets | Diane Sterling | 1 | 6 |
| Sasha Roiz | Lou Ransone | NCIS Agent Rick Hall | 6 | 1 |
| Kiara Muhammad | Kianna Harris | Kayla Vance | 1 | 5 |
| La Monde Byrd | David Hale | Marine Captain Rand Kraus | 11 | 1 |
| Ana Mercedes | Isabel Diaz | Glenda | 10 | 1 |
| Gabrielle Walsh | Ana Flores | NIS Special Agent Michelle Stamos | 10 | 1 |
| Francis X. McCarthy | Thomas | Roman Parker | 1 | 4 |
Cast data from TVmaze, licensed CC BY-SA 4.0.