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 Chuck Carrington Guest Star Nanci Chambers Guest Star Michael Bellisario Guest Star Isabella Hofmann Guest Star John DeMita Guest Star Jeff MacKay Guest Star Sharon Madden Guest Star Steve Petrarca Guest Star Mark Ivanir Guest Star Betsy Brandt Guest Star Cutch Gordon Guest Star Adam Clark Guest Star Lauri Johnson Guest Star Sam Feuer Guest Star Carey Van Dyke Guest Star Peter Pergelides Guest Star Matthew Josten Guest Star Casey Pieretti Guest Star Donald P. Bellisario Executive Producer Charles Floyd Johnson Executive Producer Stephen Zito Executive Producer Mark Horowitz Executive Producer Scott Brazil Director Dana Coen Writer