When the film was originally released in 1977, it was simply referred to as "Star Wars"; though supposedly, George Lucas had intended to include "Episode IV" and "A New Hope" in the opening crawl, but Twentieth Century Fox did not want Lucas to do so because they thought it would confuse audiences, since there were never any other episodes released before it. After the commercial success of the original Star Wars, Lucas was able to continue with the multi-film epic he originally envisioned. The first sequel, The Empire Strikes Back, was released in 1980 and bore the full title of "Star Wars, Episode V, The Empire Strikes Back" in the title crawl, although it was referred to only as "The Empire Strikes Back" as the title of its commercial release. It was the "Episode V" appearing in the opening crawl which originally confused those members of the audience who had not been made aware of what Lucas was explaining, that the original Star Wars was now to be understood to be the fourth part of a nine-part series. The original Star Wars was re-released in 1981 with a new title "Star Wars, Episode IV, A New Hope" in the title crawl. This title appeared on all subsequent re-releases and versions from then on (though the original version was released on DVD in 2006, which shows the title crawl in its original form). All subsequent Star Wars films have followed this new naming structure, although "Star Wars" often refers specifically to the 1977 film.