Nathan Stern started his career as a Watcher field agent; his assignments had included Kiri Asar from 1972-1977; Steven Ligotti from 1978-1984; Ginjer Wu 1984-1990; and finally the Immortal, Luther until the latter's death at the hands of Duncan MacLeod in 1995. Stern was then promoted to a supervisory position at the original Watcher's HQ.