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List of NCIS cast members

Updated: 11/6/2025, 2:21:58 AM Wikipedia source

Below is a list of actors and actresses that are part of the cast of the American police procedural drama television series NCIS.

Tables

· Cast members
1
1
Character
1
Portrayed by
2
Season
3
Season
4
Season
5
Season
6
Season
7
Season
8
Season
9
Season
10
Season
11
Season
12
Season
13
Season
14
Season
15
Season
16
Season
17
Season
18
Season
19
Season
20
Season
21
Season
22
Main cast
Main cast
Character
Main cast
Leroy Jethro Gibbs
Leroy Jethro Gibbs
Character
Leroy Jethro Gibbs
Portrayed by
Mark Harmon
Season
Main
Season
Does not appear
Sean Harmon (young) Micah Owens (young)
Sean Harmon (young) Micah Owens (young)
Character
Sean Harmon (young) Micah Owens (young)
Portrayed by
Does not appear
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Caitlin Todd
Caitlin Todd
Character
Caitlin Todd
Portrayed by
Sasha Alexander
Season
Main
Season
R
Season
Does not appear
Season
G
Season
Does not appear
Season
G
Season
Does not appear
Anthony DiNozzo
Anthony DiNozzo
Character
Anthony DiNozzo
Portrayed by
Michael Weatherly
Season
Main
Season
Does not appear
Season
G
Season
Does not appear
Abby Sciuto
Abby Sciuto
Character
Abby Sciuto
Portrayed by
Pauley Perrette
Season
Main
Season
Does not appear
Donald "Ducky" Mallard
Donald "Ducky" Mallard
Character
Donald "Ducky" Mallard
Portrayed by
David McCallum
Season
Main
Season
Does not appear
Adam Campbell (young)
Adam Campbell (young)
Character
Adam Campbell (young)
Portrayed by
Does not appear
Season
Main
Season
Does not appear
Season
Main
Season
Does not appear
Timothy McGee
Timothy McGee
Character
Timothy McGee
Portrayed by
Sean Murray
Season
R
Season
Main
Ziva David
Ziva David
Character
Ziva David
Portrayed by
Cote de Pablo Gabi Coccio (young)
Season
Does not appear
Season
Main
Season
Does not appear
Season
G
Season
R
Season
Does not appear
Jenny Shepard
Jenny Shepard
Character
Jenny Shepard
Portrayed by
Lauren Holly
Season
Does not appear
Season
Main
Season
Does not appear
Season
G
Season
Does not appear
Season
G
Season
Does not appear
Leon Vance
Leon Vance
Character
Leon Vance
Portrayed by
Rocky Carroll
Season
Does not appear
Season
R
Season
Main
Jimmy Palmer
Jimmy Palmer
Character
Jimmy Palmer
Portrayed by
Brian Dietzen
Season
R
Season
Main
Ellie Bishop
Ellie Bishop
Character
Ellie Bishop
Portrayed by
Emily Wickersham
Season
Does not appear
Season
Main
Season
Does not appear
Nick Torres
Nick Torres
Character
Nick Torres
Portrayed by
Wilmer Valderrama
Season
Does not appear
Season
Main
Alex Quinn
Alex Quinn
Character
Alex Quinn
Portrayed by
Jennifer Esposito
Season
Does not appear
Season
Main
Season
Does not appear
Clayton Reeves
Clayton Reeves
Character
Clayton Reeves
Portrayed by
Duane Henry
Season
Does not appear
Season
R
Season
Main
Season
Does not appear
Jack Sloane
Jack Sloane
Character
Jack Sloane
Portrayed by
Maria Bello
Season
Does not appear
Season
Main
Season
Does not appear
Kasie Hines
Kasie Hines
Character
Kasie Hines
Portrayed by
Diona Reasonover
Season
Does not appear
Season
R
Season
Main
Jessica Knight
Jessica Knight
Character
Jessica Knight
Portrayed by
Katrina Law
Season
Does not appear
Season
R
Season
Main
Alden Parker
Alden Parker
Character
Alden Parker
Portrayed by
Gary Cole
Season
Does not appear
Season
Main
Family
Family
Character
Family
Victoria Mallard
Victoria Mallard
Character
Victoria Mallard
Portrayed by
Nina Foch Caroline Lagerfelt
Season
Does not appear
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Sarah McGee
Sarah McGee
Character
Sarah McGee
Portrayed by
Troian Bellisario
Season
Does not appear
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Kelly Gibbs
Kelly Gibbs
Character
Kelly Gibbs
Portrayed by
Mary Mouser Brenna Radding Sam Schuder Mila Brener
Season
Does not appear
Season
R
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Shannon Gibbs
Shannon Gibbs
Character
Shannon Gibbs
Portrayed by
Darby Stanchfield Aviva (young)
Season
Does not appear
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Diane Sterling
Diane Sterling
Character
Diane Sterling
Portrayed by
Heather Scobie Melinda McGraw
Season
Does not appear
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Eli David
Eli David
Character
Eli David
Portrayed by
Michael Nouri Ben Morrison (young)
Season
Does not appear
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Jackson Gibbs
Jackson Gibbs
Character
Jackson Gibbs
Portrayed by
Ralph Waite Rob Notron (young)
Season
Does not appear
Season
R
Season
Does not appear
Jackie Vance
Jackie Vance
Character
Jackie Vance
Portrayed by
Paula Newsome
Season
Does not appear
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Jared Vance
Jared Vance
Character
Jared Vance
Portrayed by
Khamani Griffin Akinsola Aribo
Season
Does not appear
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Kayla Vance
Kayla Vance
Character
Kayla Vance
Portrayed by
China Anne McClain Kiara Muhammad Naomi Grace
Season
Does not appear
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Anthony DiNozzo Sr.
Anthony DiNozzo Sr.
Character
Anthony DiNozzo Sr.
Portrayed by
Robert Wagner
Season
Does not appear
Season
R
Season
Does not appear
Breena Slater
Breena Slater
Character
Breena Slater
Portrayed by
Michelle Pierce
Season
Does not appear
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Rachel Cranston
Rachel Cranston
Character
Rachel Cranston
Portrayed by
Wendy Makkena
Season
Does not appear
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Kyle Davis
Kyle Davis
Character
Kyle Davis
Portrayed by
Daniel Louis Rivas
Season
Does not appear
Season
R
Season
Does not appear
Jake Malloy
Jake Malloy
Character
Jake Malloy
Portrayed by
Jamie Bamber
Season
Does not appear
Season
R
Season
Does not appear
NCIS and Navy employees
NCIS and Navy employees
Character
NCIS and Navy employees
Tom Morrow
Tom Morrow
Character
Tom Morrow
Portrayed by
Alan Dale
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Gerald Jackson
Gerald Jackson
Character
Gerald Jackson
Portrayed by
Pancho Demmings
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Bud Roberts
Bud Roberts
Character
Bud Roberts
Portrayed by
Patrick Labyorteaux
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Stan Burley
Stan Burley
Character
Stan Burley
Portrayed by
Joel Gretsch
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Paula Cassidy
Paula Cassidy
Character
Paula Cassidy
Portrayed by
Jessica Steen
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Chris Pacci
Chris Pacci
Character
Chris Pacci
Portrayed by
Tim Kelleher
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Cassie Yates
Cassie Yates
Character
Cassie Yates
Portrayed by
Tamara Taylor
Season
Does not appear
Season
R
Season
Does not appear
Charles Sterling
Charles Sterling
Character
Charles Sterling
Portrayed by
Michael Bellisario
Season
Does not appear
Season
R
Season
Does not appear
Cynthia Sumner
Cynthia Sumner
Character
Cynthia Sumner
Portrayed by
Stephanie Mello
Season
Does not appear
Season
R
Season
Does not appear
Mike Franks
Mike Franks
Character
Mike Franks
Portrayed by
Muse Watson
Season
Does not appear
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Michelle Lee
Michelle Lee
Character
Michelle Lee
Portrayed by
Liza Lapira
Season
Does not appear
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Nikki Jardine
Nikki Jardine
Character
Nikki Jardine
Portrayed by
Susan Kelechi Watson
Season
Does not appear
Season
R
Season
Does not appear
Brent Langer
Brent Langer
Character
Brent Langer
Portrayed by
Jonathan LaPaglia
Season
Does not appear
Season
R
Season
Does not appear
Chad Dunham
Chad Dunham
Character
Chad Dunham
Portrayed by
Todd Lowe
Season
Does not appear
Season
R
Season
Does not appear
Phillip Davenport
Phillip Davenport
Character
Phillip Davenport
Portrayed by
Jude Ciccolella
Season
Does not appear
Season
R
Season
Does not appear
Season
R
Season
Does not appear
G. Callen
G. Callen
Character
G. Callen
Portrayed by
Chris O'Donnell
Season
Does not appear
Season
G
Season
Does not appear
Season
G
Season
Does not appear
Sam Hanna
Sam Hanna
Character
Sam Hanna
Portrayed by
LL Cool J
Season
Does not appear
Season
G
Season
Does not appear
Season
G
Season
Does not appear
Season
G
Daniela Ruah
Daniela Ruah
Character
Daniela Ruah
Portrayed by
Kensi Blye
Season
Does not appear
Season
G
Season
Does not appear
Season
G
Season
Does not appear
Susan Grady
Susan Grady
Character
Susan Grady
Portrayed by
Jackie Geary
Season
Does not appear
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Riley McCallister
Riley McCallister
Character
Riley McCallister
Portrayed by
Michael O'Neill
Season
Does not appear
Season
R
Season
Does not appear
E.J. Barrett
E.J. Barrett
Character
E.J. Barrett
Portrayed by
Sarah Jane Morris
Season
Does not appear
Season
R
Season
Does not appear
Simon Cade
Simon Cade
Character
Simon Cade
Portrayed by
Matt Willig
Season
Does not appear
Season
R
Season
Does not appear
Gayne Levin
Gayne Levin
Character
Gayne Levin
Portrayed by
Alimi Ballard
Season
Does not appear
Season
R
Season
Does not appear
Clayton Jarvis
Clayton Jarvis
Character
Clayton Jarvis
Portrayed by
Matt Craven
Season
Does not appear
Season
R
Season
Does not appear
Ned Dorneget
Ned Dorneget
Character
Ned Dorneget
Portrayed by
Matt Jones
Season
Does not appear
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Jerome Craig
Jerome Craig
Character
Jerome Craig
Portrayed by
Greg Germann
Season
Does not appear
Season
R
Season
Does not appear
Sarah Porter
Sarah Porter
Character
Sarah Porter
Portrayed by
Leslie Hope
Season
Does not appear
Season
R
Season
Does not appear
Tony Francis
Tony Francis
Character
Tony Francis
Portrayed by
Tony Gonzalez
Season
Does not appear
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Qasim Naasir
Qasim Naasir
Character
Qasim Naasir
Portrayed by
Rafi Silver
Season
Does not appear
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Other agencies
Other agencies
Character
Other agencies
Tobias Fornell
Tobias Fornell
Character
Tobias Fornell
Portrayed by
Joe Spano
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Faith Coleman
Faith Coleman
Character
Faith Coleman
Portrayed by
Alicia Coppola
Season
R
Season
Does not appear
Ron Sacks
Ron Sacks
Character
Ron Sacks
Portrayed by
Don Franklin
Season
Does not appear
Season
R
Season
Does not appear
Hollis Mann
Hollis Mann
Character
Hollis Mann
Portrayed by
Susanna Thompson
Season
Does not appear
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Trent Kort
Trent Kort
Character
Trent Kort
Portrayed by
David Dayan Fisher
Season
Does not appear
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Michael Rivkin
Michael Rivkin
Character
Michael Rivkin
Portrayed by
Merik Tadros
Season
Does not appear
Season
R
Season
Does not appear
Amit Hadar
Amit Hadar
Character
Amit Hadar
Portrayed by
Arnold Vosloo
Season
Does not appear
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Danny Sportelli
Danny Sportelli
Character
Danny Sportelli
Portrayed by
Jack Conley
Season
Does not appear
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Abigail Borin
Abigail Borin
Character
Abigail Borin
Portrayed by
Diane Neal
Season
Does not appear
Season
R
Season
Does not appear
Malachi Ben-Gidon
Malachi Ben-Gidon
Character
Malachi Ben-Gidon
Portrayed by
TJ Ramini
Season
Does not appear
Season
R
Season
Does not appear
Ray Cruz
Ray Cruz
Character
Ray Cruz
Portrayed by
Enrique Murciano
Season
Does not appear
Season
R
Season
Does not appear
Samantha Ryan
Samantha Ryan
Character
Samantha Ryan
Portrayed by
Jamie Lee Curtis
Season
Does not appear
Season
R
Season
Does not appear
Delilah Fielding
Delilah Fielding
Character
Delilah Fielding
Portrayed by
Margo Harshman
Season
Does not appear
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Zoe Keats
Zoe Keats
Character
Zoe Keats
Portrayed by
Marisol Nichols
Season
Does not appear
Season
R
Season
Does not appear
Antagonists
Antagonists
Character
Antagonists
Ari Haswari
Ari Haswari
Character
Ari Haswari
Portrayed by
Rudolf Martin
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Mamoun Sharif
Mamoun Sharif
Character
Mamoun Sharif
Portrayed by
Enzo Cilenti
Season
Does not appear
Season
R
Season
Does not appear
René Benoit ("La Grenouille")
René Benoit ("La Grenouille")
Character
René Benoit ("La Grenouille")
Portrayed by
Armand Assante
Season
Does not appear
Season
R
Season
Does not appear
Saleem Ulman
Saleem Ulman
Character
Saleem Ulman
Portrayed by
Omid Abtahi
Season
Does not appear
Season
R
Season
Does not appear
Alejandro Rivera
Alejandro Rivera
Character
Alejandro Rivera
Portrayed by
Marco Sanchez
Season
Does not appear
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Paloma Reynosa
Paloma Reynosa
Character
Paloma Reynosa
Portrayed by
Jacqueline Obradors
Season
Does not appear
Season
R
Season
Does not appear
Agah Bayar
Agah Bayar
Character
Agah Bayar
Portrayed by
Tamer Hassan
Season
Does not appear
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Jonas Cobb
Jonas Cobb
Character
Jonas Cobb
Portrayed by
Kerr Smith
Season
Does not appear
Season
R
Season
Does not appear
Jonathan Cole
Jonathan Cole
Character
Jonathan Cole
Portrayed by
Scott Wolf
Season
Does not appear
Season
R
Season
Does not appear
Sean Latham
Sean Latham
Character
Sean Latham
Portrayed by
Philip Casnoff
Season
Does not appear
Season
R
Season
Does not appear
Harper Dearing
Harper Dearing
Character
Harper Dearing
Portrayed by
Richard Schiff
Season
Does not appear
Season
R
Season
Does not appear
Ilan Bodnar
Ilan Bodnar
Character
Ilan Bodnar
Portrayed by
Oded Fehr
Season
Does not appear
Season
R
Season
Does not appear
Paul Triff
Paul Triff
Character
Paul Triff
Portrayed by
French Stewart
Season
Does not appear
Season
R
Season
Does not appear
Gabriel Hicks
Gabriel Hicks
Character
Gabriel Hicks
Portrayed by
Graham Hamilton
Season
Does not appear
Season
R
Season
Does not appear
Other characters
Other characters
Character
Other characters
Jeanne Benoit
Jeanne Benoit
Character
Jeanne Benoit
Portrayed by
Scottie Thompson
Season
Does not appear
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Emily Fornell
Emily Fornell
Character
Emily Fornell
Portrayed by
Payton Spencer Juliette Angelo
Season
Does not appear
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Damon Werth
Damon Werth
Character
Damon Werth
Portrayed by
Paul Telfer
Season
Does not appear
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Leyla Shakarji
Leyla Shakarji
Character
Leyla Shakarji
Portrayed by
Tehmina Sunny
Season
Does not appear
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Carol Wilson
Carol Wilson
Character
Carol Wilson
Portrayed by
Meredith Eaton
Season
Does not appear
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Season
R
Season
Does not appear
Season
R
Margaret Allison Hart
Margaret Allison Hart
Character
Margaret Allison Hart
Portrayed by
Rena Sofer
Season
Does not appear
Season
R
Season
Does not appear
Dr. Cyril Taft
Dr. Cyril Taft
Character
Dr. Cyril Taft
Portrayed by
Jon Cryer
Season
Does not appear
Season
R
Season
Does not appear
Dr. Grace Confalone
Dr. Grace Confalone
Character
Dr. Grace Confalone
Portrayed by
Laura San Giacomo
Season
Does not appear
Season
R
Season
Does not appear
Season
R
Jessica Shaeffer
Jessica Shaeffer
Character
Jessica Shaeffer
Portrayed by
Hilary Ward
Season
Does not appear
Season
R
Season
Does not appear
Phineas
Phineas
Character
Phineas
Portrayed by
Jack Fisher
Season
Does not appear
Season
R
Season
Does not appear
Marcie Warren
Marcie Warren
Character
Marcie Warren
Portrayed by
Pam Dawber
Season
Does not appear
Season
R
Season
Does not appear
Character
Portrayed by
Season
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
Main cast
Leroy Jethro Gibbs
Mark Harmon
Main
Does not appear
Sean Harmon (young) Micah Owens (young)
Does not appear
R
Does not appear
R
Does not appear
R
Does not appear
Caitlin Todd
Sasha Alexander
Main
R
Does not appear
G
Does not appear
G
Does not appear
Anthony DiNozzo
Michael Weatherly
Main
Does not appear
G
Does not appear
Abby Sciuto
Pauley Perrette
Main
Does not appear
Donald "Ducky" Mallard
David McCallum
Main
Does not appear
Adam Campbell (young)
Does not appear
Main
Does not appear
Main
Does not appear
Timothy McGee
Sean Murray
R
Main
Ziva David
Cote de Pablo Gabi Coccio (young)
Does not appear
Main
Does not appear
G
R
Does not appear
Jenny Shepard
Lauren Holly
Does not appear
Main
Does not appear
G
Does not appear
G
Does not appear
Leon Vance
Rocky Carroll
Does not appear
R
Main
Jimmy Palmer
Brian Dietzen
R
Main
Ellie Bishop
Emily Wickersham
Does not appear
Main
Does not appear
Nick Torres
Wilmer Valderrama
Does not appear
Main
Alex Quinn
Jennifer Esposito
Does not appear
Main
Does not appear
Clayton Reeves
Duane Henry
Does not appear
R
Main
Does not appear
Jack Sloane
Maria Bello
Does not appear
Main
Does not appear
Kasie Hines
Diona Reasonover
Does not appear
R
Main
Jessica Knight
Katrina Law
Does not appear
R
Main
Alden Parker
Gary Cole
Does not appear
Main
Family
Victoria Mallard
Nina Foch Caroline Lagerfelt
Does not appear
R
Does not appear
R
Does not appear
Sarah McGee
Troian Bellisario
Does not appear
R
Does not appear
R
Does not appear
Kelly Gibbs
Mary Mouser Brenna Radding Sam Schuder Mila Brener
Does not appear
R
R
Does not appear
R
Does not appear
R
Does not appear
Shannon Gibbs
Darby Stanchfield Aviva (young)
Does not appear
R
Does not appear
R
Does not appear
R
Does not appear
Diane Sterling
Heather Scobie Melinda McGraw
Does not appear
R
Does not appear
R
Does not appear
R
Does not appear
Eli David
Michael Nouri Ben Morrison (young)
Does not appear
R
Does not appear
R
Does not appear
Jackson Gibbs
Ralph Waite Rob Notron (young)
Does not appear
R
Does not appear
Jackie Vance
Paula Newsome
Does not appear
R
Does not appear
R
Does not appear
Jared Vance
Khamani Griffin Akinsola Aribo
Does not appear
R
Does not appear
R
Does not appear
Kayla Vance
China Anne McClain Kiara Muhammad Naomi Grace
Does not appear
R
Does not appear
R
Does not appear
R
Does not appear
R
Does not appear
Anthony DiNozzo Sr.
Robert Wagner
Does not appear
R
Does not appear
Breena Slater
Michelle Pierce
Does not appear
R
Does not appear
R
Does not appear
R
Does not appear
R
Does not appear
Rachel Cranston
Wendy Makkena
Does not appear
R
Does not appear
R
Does not appear
Kyle Davis
Daniel Louis Rivas
Does not appear
R
Does not appear
Jake Malloy
Jamie Bamber
Does not appear
R
Does not appear
NCIS and Navy employees
Tom Morrow
Alan Dale
R
Does not appear
R
Does not appear
Gerald Jackson
Pancho Demmings
R
Does not appear
R
Does not appear
Bud Roberts
Patrick Labyorteaux
R
Does not appear
R
Does not appear
Stan Burley
Joel Gretsch
R
Does not appear
R
Does not appear
R
Does not appear
Paula Cassidy
Jessica Steen
R
Does not appear
R
Does not appear
Chris Pacci
Tim Kelleher
R
Does not appear
R
Does not appear
R
Does not appear
Cassie Yates
Tamara Taylor
Does not appear
R
Does not appear
Charles Sterling
Michael Bellisario
Does not appear
R
Does not appear
Cynthia Sumner
Stephanie Mello
Does not appear
R
Does not appear
Mike Franks
Muse Watson
Does not appear
R
Does not appear
R
Does not appear

References

  1. Season 11
  2. Sasha Alexander reprised her role as Kate in an uncredited voice role in the season eight episode "A Man Walks Into a Ba
  3. Lauren Holly did not appear in any new original material for the season nine episode "Life Before His Eyes" as well as t
  4. Brian Dietzen was given guest star credits in seasons one through five, and "also starring" credits in seasons six throu
  5. Season 2 & 3
  6. Season 14
  7. Season 3 & 4
  8. Season 5
  9. Season 9
  10. Season 13
  11. Season 4
  12. Season 6
  13. Season 6
  14. Season 9 - 12
  15. Season 4
  16. Entertainment Weekly
    http://insidetv.ew.com/2012/06/19/ncis-brian-dietzen-series-regular/
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