La Femme Nikita (1997) : 4x7

Operation calls Michael and Nikita out on a favor, he orders them to protect a Vietnam vet by the name of Willie Cain, a man who is now little more than a drifter and a bum, from the thugs who are out to get him in a deal gone bad. Operations believes that he would not have survived capture and torture in Vietnam without Willie's help. What Nikita and Michael don't know is that they are embarking on a mission that will mix them up with Operations' Vietnamese torturer, Fan Van Lin, Carlo Bonaventure the head of a Mafia Crime Family. Meanwhile, Birkoff develops a sudden interest in how he became part of Section, the place he has been in all his life. An interest leads him to the discovery of an unknown twin brother, and a duplicitous history involving Walter.