Stranger than fiction: the script title was "The Sexual Limits," which was planned by writer Cash Markman as a series of movies dealing with the occult and things bordering on science fiction, much like the 1960's TV series "The Outer Limits." The idea of a series was abandoned with the title change. Oddly, this was the second Markman script to be released with the title "Eternity." Another came out one year earlier, through Sin City, directed by Scotty Fox. That script also started with the title "The Sexual Limits," although it contained a different plot than seen here.