Darsteller
| Rolle | Schauspieler | Synchronsprecher[3] | Hauptrolle (Episoden) |
Nebenrolle (Episoden) |
|---|---|---|---|---|
| Leroy Jethro Gibbs | Mark Harmon | Wolfgang Condrus | 1x01– | |
| Anthony „Tony“ DiNozzo | Michael Weatherly | Norman Matt | 1x01– | |
| Timothy „Tim“ McGee | Sean Murray | Staffel 1 bis Episode 2x12: Timm Neu seitdem Marius Götze-Clarén |
2x01– | 1x07, 1x11,
1x18–1x23 |
| Abigail „Abby“ Sciuto | Pauley Perrette | Antje von der Ahe | 1x01– | |
| Dr. Donald „Ducky“ Mallard | David McCallum | Eberhard Prüter | 1x01– | |
| Ziva David | Cote de Pablo | Maria Koschny | 3x04– | 3x01–3x02 |
| Leon Vance | Rocky Carroll | Leon Boden | 6x01– | 5x14, 5x18, 5x19 |
| Jennifer „Jenny“ Shepard † | Lauren Holly | Arianne Borbach | 3x9–5x19 | 3x01–3x08 |
| Caitlin „Kate“ Todd † | Sasha Alexander | Ghadah Al-Akel | 1x01–2x23 | 3x01–3x02 |
| Tobias C. Fornell | Joe Spano | Klaus-Dieter Klebsch | 1x01– | |
| Agent Michelle Lee † | Liza Lapira | Uschi Hugo | 4x01–6x09 | |
| Agent Ronald Sacks | Don Franklin | Marco Kröger (3x09), Oliver Feld | 3x09– | |
| Jimmy Palmer | Brian Dietzen | Rainer Fritzsche | 1x21– | |
| Thomas „Tom“ Morrow | Alan Dale | Otto Mellies | 1x01–3x01 | |
| Charles „Chip“ Sterling | Michael Bellisario | Tommy Morgenstern | 3x06–3x09 | |
| Gerald Jackson | Pancho Demmings | Sebastian Jakob | 1x01–1x16; 3x01–3x02 | |
| Special Agent Paula Cassidy † | Jessica Steen | Andrea-Kathrin Loewig | 1x08–4x19 | |
| Dr. Ari Haswari † | Rudolf Martin | Markus Pfeiffer | 1x16–3x02 | |
| René Benoit (La Grenouille) † | Armand Assante | Lutz Riedel | 4x14–5x01 | |
| Dr. Jeanne Benoit | Scottie Thompson | Ranja Bonalana | 4x07–5x14 | |
| Army Lt. Col. Hollis Mann | Susanna Thompson | Andrea Rabow | 4x07–5x03 | |
| Vivian Blackadder | Robyn Lively | Maud Ackermann | Backdoor-Pilot | |
| Brent Langer † | Jonathan LaPaglia | Dietmar Wunder | 5x11, 6x01 | |
| Daniel T. Keating | Jonathan Mangum | Gerrit Schmidt-Foß | 6x01 |