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 Karri Turner Ensign, Lt. j.g. Harriet Sims Actor Chuck Carrington Actor Scott Lawrence Cmdr. Sturgis Turner Actor Jennifer Savidge Guest Star Nanci Chambers Guest Star Zoe McLellan Petty Officer Jennifer Coates Guest Star David Gail Guest Star Lyman Ward Guest Star Wayne Wilderson Guest Star Missy Yager Guest Star Henriette Ivanans Guest Star Laura Johnson Guest Star Martin Hewitt Guest Star Matt Carmody Guest Star Jeff Wincott Guest Star Jennifer Tung Guest Star Laura Vitale Guest Star Donald P. Bellisario Executive Producer Charles Floyd Johnson Executive Producer Stephen Zito Executive Producer Mark Horowitz Executive Producer Bradford May Director Paul J. Levine Writer