Elenco principal da temporada 8

1. 

   Mark Harmon

   Leroy Jethro Gibbs

2. 

   Sean Murray

   Timothy McGee

3. 

   Wilmer Valderrama

   Nick Torres

4. 

   Brian Dietzen

   Jimmy Palmer

5. 

   David McCallum

   Dr. Donald 'Ducky' Mallard

6. 

   Emily Wickersham

   Ellie Bishop

7. 

   Rocky Carroll

   Leon Vance

8. 

   Diona Reasonover

   Kasie Hines

Convidados Especiais 8

1. 

   Katrina Law

   Jessica Knight

2. 

   Chris Browning

   NCIS REACT Supervisory Special Agent Tom Dalton

3. 

   Edward Gelhaus

   NCIS REACT Special Agent Edward Madden

4. 

   West Liang

   Peter Kessler

5. 

   Pam Dawber

   Marcie Warren

6. 

   Tim Fox

   Navy Petty Officer Second Class Toby Withers

7. 

   Emmie Nagata

   NCIS REACT Special Agent Diana Ono

8. 

   Tristan Cunningham

   Nurse Janeway

Equipa técnica 3