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 Actor Karri Turner Ensign, Lt. j.g. Harriet Sims Guest Star Nanci Chambers Guest Star Steven Culp Guest Star Scott Paulin Guest Star Zoe McLellan Petty Officer Jennifer Coates Guest Star Tom Amandes Guest Star Francesco Quinn Guest Star Bo Svenson Guest Star Steve Ryan Guest Star Grand Bush Guest Star Lisa Ann Hadley Guest Star Jeffrey Dean Morgan Guest Star Peter J. Lucas Guest Star Greg Lee Guest Star Kris Iyer Guest Star Noah Blake Guest Star Jay Harik Guest Star Armando Valdes-Kennedy Guest Star José Solano Guest Star David Aranovich Guest Star Nicholas Xatzis Guest Star Donald P. Bellisario Executive Producer Charles Floyd Johnson Executive Producer Stephen Zito Executive Producer Mark Horowitz Executive Producer Bradford May Director Charles D. Holland Writer