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 James MacDonald Guest Star Michael Gaston Guest Star Thomas Vincent Kelly Guest Star Derek Webster Guest Star Jeff Austin Guest Star Jon Erik Guest Star Stephen Markle Guest Star William Russ Guest Star Martin Papazian Guest Star Jeremy Ray Valdez Guest Star Stana Katic Guest Star Jarrod Bunch Guest Star Donald P. Bellisario Executive Producer Charles Floyd Johnson Executive Producer Stephen Zito Executive Producer Mark Horowitz Executive Producer Bradford May Director Philip DeGuere Jr. Writer