 While most of the staff is on leave during Christmas Eve, McMurphy, Dr. Richard, Lila and others left behind become deluged with scores of casualties, both military and civilian, including a machine-gun toting St. Nick. Dr. Richard becomes understandably grumpy when he learns that his wife is dating another man back home. Meanwhile, Frankie helps Beckett in the morgue where he meets a grief-stricken Vietnamese woman, named Mai, who s cousin, an officer in the ARVN, has just been killed.