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 Actor Dean Stockwell Guest Star Michael Bellisario Guest Star David Labiosa Guest Star David Batiste Guest Star Aaron Smolinski Guest Star Jacqueline Hahn Guest Star Andy Rolfes Guest Star John Hemphill Guest Star Marcelo Tubert Guest Star Ray Proscia Guest Star Dariush Kashani Guest Star Fitz Houston Guest Star Andrea Gabriel Guest Star Paul Vincent O'Connor Guest Star Laurence Todd Rosenthal Guest Star Patrick Thomas O'Brien Guest Star Max Jansen Guest Star Matthew Josten Guest Star Scott Lawrence Cmdr. Sturgis Turner Actor Zoe McLellan Petty Officer Jennifer Coates Actor Donald P. Bellisario Executive Producer Charles Floyd Johnson Executive Producer Stephen Zito Executive Producer Mark Horowitz Executive Producer Dennis Smith Director Larry Moskowitz Writer