Elenco principal da temporada 4

1. 

   David James Elliott

   Harmon Rabb

2. 

   Catherine Bell

   Sarah MacKenzie

3. 

   Patrick Labyorteaux

   Bud Roberts

4. 

   John M. Jackson

   AJ Chegwidden

Convidados Especiais 25

1. 

   Christopher Daniel Barnes

   Lt. Andy Kingsley

2. 

   Julia Nickson

   Lynne Kennedy

3. 

   Stephen Snedden

   Airman Stover

4. 

   Gloria Allred

   Self

5. 

   Johnnie Cochran

   Self

6. 

   Craig Kilborn

   Self

7. 

   Mary Hart

   Self

8. 

   Robert LuPone

   Mel Hayden

9. 

   Clyde Kusatsu

   Capt. Morimoto

10. 

    David Naughton

    Det. Grady

11. 

    Marc Gomes

    Gunnery Sergeant

12. 

    Hayley DuMond

    Ens. Susan Kingsley

13. 

    Anna Berger

    Mrs. Palermo

14. Julie Pop

    Dr. Amy Winston

15. 

    Robb Reesman

    Master Chief Newman

16. 

    Tina Lifford

    Juanita Ressler

17. 

    Ronnie Marmo

    P.O. Matteo Palermo

18. Kris Iyer

    Lt. Cmdr. Murphy

19. 

    Sofia Karstens

    Misty James

20. 

    Vincent Duvall

    President

21. 

    Sean Murray

    Danny Walden

22. 

    Randy Vasquez

    Victor 'Gunny' Galindez

23. 

    Chuck Carrington

    Jason Tiner

24. 

    Nanci Chambers

    Loren Singer

25. 

    Karri Turner

    Harriet Sims

Equipa técnica 5