David James Elliott Lt., Lt. Cmdr. Harmon "Harm" Rabb, Jr. Actor Catherine Bell Maj., Lt. Col. Sarah "Mac" MacKenzie Actor Patrick Laborteaux Lt. j.g., Lt. Bud Roberts Actor Karri Turner Ensign, Lt. j.g. Harriet Sims Actor Scott Lawrence Cmdr. Sturgis Turner Actor Zoe McLellan Petty Officer Jennifer Coates Actor David Andrews Maj. Gen. Gordon "Biff" Cresswell Actor Michael Bellisario Guest Star Mia Korf Guest Star Jeff MacKay Guest Star Julius Carry Guest Star Peter Onorati Guest Star Peter Kwong Guest Star Kurt Larson Guest Star John Petrelli Guest Star Will Schaub Guest Star Rolonda Watts Guest Star Bart Johnson Guest Star Bruce Wright Guest Star John Pleshette Guest Star Andrew Borba Guest Star Alan Blumenfeld Guest Star Sean T. Krishnan Guest Star Donald P. Bellisario Executive Producer Charles Floyd Johnson Executive Producer Stephen Zito Executive Producer Mark Horowitz Executive Producer Oz Scott Director Larry Moskowitz Writer