La Femme Nikita Season 1 Episode 5

Mother

A nuclear trigger is stolen by a cold-blooded terrorist couple responsible for killing an entire team of Section One operatives. In an attempt to retrieve the trigger, Nikita poses as the wife, Helen's long-lost daughter, who was put up for adoption because Helen was in prison at the time of her birth. However, this leads to unexpected consequences for both "mother" and "daughter."