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 Actor Chuck Carrington Actor Scott Lawrence Cmdr. Sturgis Turner Actor Nanci Chambers Actor Randy Vasquez Guest Star Steven Culp Guest Star Zoe McLellan Petty Officer Jennifer Coates Guest Star David Akert Guest Star Bernard White Guest Star Gregory Cooke Guest Star Jodi Bianca Wise Guest Star Theodore Bikel Guest Star Del Zamora Guest Star Jack Stehlin Guest Star Ali Afshar Guest Star Stephanie León Guest Star Donald P. Bellisario Executive Producer Charles Floyd Johnson Executive Producer Stephen Zito Executive Producer, Writer Mark Horowitz Executive Producer Bradford May Director