Skywalker Saga. The main Star Wars film series is a trilogy of trilogies; as it neared completion, it began to be referred to as the "Skywalker Saga". It was released beginning with the original trilogy (Episodes IV, V and VI, 1977–1983), followed by the prequel trilogy (Episodes I, II and III, 1999–2005) and the sequel trilogy (Episodes VII, VIII and IX, 2015–2019).
Star Trek: Phase II was a 1970s follow-up live-action television series to The Original Series. Though sets were constructed, scripts written, characters cast, and production started, the series was cancelled in favor of The Motion Picture , the first Star Trek feature film.