Jocko Sims
Lt. Carlton Burk (17 eps)
Eric Dane
CO CDR Tom Chandler (10 eps)
Rhona Mitra
Dr. Rachel Scott (10 eps)
Adam Baldwin
XO Mike Slattery (10 eps)
Charles Parnell
CMC Jeter (10 eps)
Travis Van Winkle
Lt. Danny Green (10 eps)
Sam Spruell
Dr. Quincy Tophet (10 eps)
Marissa Neitling
LT. Kara Foster (10 eps)
Christina Elmore
Lt. Alisha Granderson (10 eps)
Kevin Michael Martin
Miller (10 eps)
Michael Curran-Dorsano
Gator (10 eps)
Dichen Lachman
Jesse (10 eps)
Andy T. Tran
Lt. Andy Chung (8 eps)
Chris Sheffield
Lt. Will Mason (8 eps)
Ness Bautista
Cruz (7 eps)
Alice Coulthard
Kelly Tophet (voice) (6 eps)
Ravil Isyanov
Admiral Konstantin Nikolajewitsch Ruskov (4 eps)
Hope Olaidé Wilson
Bertrise (4 eps)
Ebon Moss-Bachrach
American Scientist (3 eps)
Eugene Alper
Russian Officer (3 eps)
Ilia Volok
Dimitri (3 eps)
Tracy Middendorf
Darien Chandler (3 eps)
Grace Kaufman
Ashley Chandler (3 eps)
Aidan Sussman
Sam Chandler (3 eps)
Felisha Cooper
Maya Gibson (3 eps)
Kevin Phillips
Francis 'Frank' Benz (1 eps)
Darren O'Hare
Lt. Siegle (1 eps)
Alyssa Diaz
Quartermaster Rios (1 eps)
Deborah May
President (1 eps)
Michael Benyaer
Amir (1 eps)
Alex Fernandez
Ervin Delgado (1 eps)
José Zúñiga
El Toro (1 eps)
Hina Abdullah
Dalia (1 eps)
Alfre Woodard
Amy Granderson (1 eps)
Derk Cheetwood
Lt. Pete Norris (1 eps)
Emily Tosta
Luisa (1 eps)