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 Karri Turner Ensign, Lt. j.g. Harriet Sims Guest Star Chuck Carrington Guest Star Peter Murnik Guest Star Michael Whaley Guest Star Seth Jaffe Guest Star Gerald McRaney Guest Star James Patrick Stuart Guest Star Kat Sawyer Guest Star John K. Linton Guest Star Philippe Bergeron Guest Star Michael Archer Guest Star Donald P. Bellisario Executive Producer Charles Floyd Johnson Executive Producer Stephen Zito Executive Producer Bradford May Director Ed Zuckerman Writer