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 Karri Turner Ensign, Lt. j.g. Harriet Sims Guest Star Randy Vasquez Guest Star Chuck Carrington Guest Star Trevor Goddard Guest Star Paul Collins Guest Star Jaimz Woolvett Guest Star Michael Bellisario Guest Star Steven Culp Guest Star Jeff MacKay Guest Star W. K. Stratton Guest Star Paul Mendoza Guest Star Donald P. Bellisario Executive Producer Charles Floyd Johnson Executive Producer Stephen Zito Executive Producer Mark Horowitz Director Ed Zuckerman Writer Nelson Costello Writer