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 Steven Culp Guest Star Trevor Goddard Guest Star Jo Champa Guest Star Sean Masterson Guest Star John Mariano Guest Star Jeff Coucette Guest Star Tony Noakes Guest Star Mario Di Donato Guest Star Victoria Rome Guest Star Luciano Miele Guest Star Harry Danner Guest Star Chuck Carrington Guest Star Donald P. Bellisario Executive Producer, Writer Charles Floyd Johnson Executive Producer Stephen Zito Executive Producer Jeannot Szwarc Director