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 John M. Jackson Actor Randy Vasquez Guest Star Karri Turner Ensign, Lt. j.g. Harriet Sims Guest Star Paul Collins Guest Star Chuck Carrington Guest Star Anne-Marie Johnson Guest Star Cindy Ambuehl Guest Star Nanci Chambers Guest Star John DeMita Guest Star Jennifer Savidge Guest Star Steven Culp Guest Star Scott Lawrence Cmdr. Sturgis Turner Guest Star Mae Whitman Guest Star Zoe McLellan Petty Officer Jennifer Coates Guest Star Francesco Quinn Guest Star Jade Carter Guest Star John D'Aquino Guest Star Donald P. Bellisario Executive Producer Charles Floyd Johnson Executive Producer Stephen Zito Executive Producer, Writer Mark Horowitz Executive Producer Terrence O'Hara Director Greg Beeman Director Don McGill Writer Bradford May Director David Ehrman Writer Jeannot Szwarc Director Rod Hardy Director Dennis Smith Director James Whitmore Jr. Director Jerry London Director Richard Compton Director Dana Coen Writer Paul J. Levine Writer Hugo Cortina Director Lyn Greene Writer