David James Elliott Lt., Lt. Cmdr. Harmon "Harm" Rabb, Jr. Actor Catherine Bell Maj., Lt. Col. Sarah "Mac" MacKenzie Actor John M. Jackson Actor Patrick Laborteaux Lt. j.g., Lt. Bud Roberts Actor Karri Turner Ensign, Lt. j.g. Harriet Sims Guest Star Kevin Conway Guest Star John Wesley Guest Star Red Sanders Guest Star Zack Ward Guest Star John Hostetter Guest Star Karen Austin Guest Star Bill Birch Guest Star Javier Grajeda Guest Star David Starwalt Guest Star Michelle Davison Guest Star David Sage Guest Star Franc Luz Guest Star Donald P. Bellisario Executive Producer Charles Floyd Johnson Executive Producer Stephen Zito Executive Producer Tony Wharmby Director Dana Coen Writer