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 7

1. 

   Scott Lawrence

   Sturgis Turner

2. 

   Isabella Hofmann

   Meredith Cavanaugh

3. 

   Karri Turner

   Harriet Sims

4. 

   Chuck Carrington

   Petty Officer First Class Jason Tiner

5. 

   Tamlyn Tomita

   Lt. Cmdr. Tracy Manetti

6. 

   Craig Kirkwood

   Cpl. Sean Stiles

7. 

   Burgess Jenkins

   Lt. Jack Kersey

Equipa Técnica 3