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 Scott Lawrence Cmdr. Sturgis Turner Guest Star Karri Turner Ensign, Lt. j.g. Harriet Sims Guest Star Anne-Marie Johnson Guest Star Lana Parrilla Guest Star Michele Greene Guest Star Tim Dunigan Guest Star Anthony Azizi Guest Star Marshall Manesh Guest Star Bruce Gray Guest Star Fred Tom Guest Star Scott Hamm Guest Star Elyse Mirto Guest Star Chris Wynne Guest Star Vern Urich Guest Star Donald P. Bellisario Executive Producer Charles Floyd Johnson Executive Producer Stephen Zito Executive Producer Mark Horowitz Executive Producer Terrence O'Hara Director Don McGill Writer