Stargate refers to the science fiction meia franchise owned by MGM that began in 1994 with the feature film Stargate. The subsequent body of works detail an elaborate fictional universe where Earth battles hostile aliens possessing superior technology or supernatural powers. The film's story is continued in novel form, in two live-action television series (Stargate SG-1 and Stargate Atlantis), one animated series (Stargate Infinity), and in other derivative works. Due to multiple developers working separately and independently on the franchise over the years, the various Stargate productions are not entirely consistent with each other: no set of works forms a "correct" or official canon. The largest fanbase exists for the story that begins with the original film, and continues with Stargate SG-1 (1997–2007) and Stargate Atlantis (since 2004).