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 Trevor Goddard Guest Star Randy Vasquez Guest Star Karri Turner Ensign, Lt. j.g. Harriet Sims Guest Star Chuck Carrington Guest Star Cindy Ambuehl Guest Star Nanci Chambers Guest Star Mae Whitman Guest Star Sibel Galindez Guest Star Gary Graham Guest Star Kenna J. Ramsey Guest Star Rick Hall Guest Star Lance Guest Guest Star David Quane Guest Star Reggie Currelley Guest Star Daniel Nathan Spector Guest Star Ann Morrison Guest Star Scott Hoxby Guest Star Monique Edwards Guest Star Linda Klein Guest Star Marc Valera Guest Star Matt Sigloch Guest Star Donald P. Bellisario Executive Producer Charles Floyd Johnson Executive Producer Stephen Zito Executive Producer, Writer Mark Horowitz Executive Producer Bradford May Director Dana Coen Writer