David James Elliott

as Captain Harmon "Harm" Rabb Jr., USN

Patrick Labyorteaux

as Captain Bud J. Roberts Jr., USN

Catherine Bell

as Lieutenant Colonel Sarah "Mac" MacKenzie, USMC

John M. Jackson

as Rear Admiral A.J. Chegwidden, USN

Karri Turner

as Lieutenant Harriet Sims-Roberts, USN

Chuck Carrington

as Yeoman First Class (YN1) Jason Tiner, USN

Trevor Goddard

as Lieutenant Commander Mic Brumby, CSC, RAN

Randy Vasquez

as Gunnery Sergeant Victor Galindez, USMC

Nanci Chambers

as Lieutenant Loren Singer, USN

Steven Culp

as Special Agent Clayton Webb