David James Elliott Lt., Lt. Cmdr. Harmon "Harm" Rabb, Jr. Actor, Director 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 Guest Star Randy Vasquez Guest Star Paul Collins Guest Star Trevor Goddard Guest Star Chuck Carrington Guest Star Nanci Chambers Guest Star Michael Bellisario Guest Star Rif Hutton Guest Star Sean Murray Guest Star Cindy Ambuehl Guest Star Anne-Marie Johnson Guest Star Steven Culp Guest Star Aleksandr Kuznetsov Guest Star Harrison Page Guest Star Jennifer Savidge Guest Star Laurence Lau Guest Star Donald P. Bellisario Executive Producer Charles Floyd Johnson Executive Producer Stephen Zito Executive Producer, Writer Bradford May Director Jeannot Szwarc Director Mark Horowitz Director Scott Brazil Director Terrence O'Hara Director Alan J. Levi Director James Whitmore Jr. Director Michael Schultz Director Jerry London Director Dana Coen Writer Ed Zuckerman Writer Paul Levine Writer Larry Moskowitz Writer Mark Saraceni Writer Paul J. Levine Writer