Stargate is a science fiction media franchise based on the film written by Dean Devlin and Roland Emmerich. The franchise is based on the idea of an alien Einstein–Rosen bridge device (the Stargate) that enables nearly instantaneous travel across the cosmos. The franchise began with the film Stargate, released on October 28, 1994, by Metro-Goldwyn-Mayer and Carolco, which grossed US$197 million worldwide. In 1997, Brad Wright and Jonathan Glassner created a television series titled Stargate SG-1 as a sequel to the film. This show was joined by Stargate Atlantis in 2004, Stargate Universe in 2009, and a prequel web series, Stargate Origins, in 2018. Also consistent with the same story are a variety of books, video games and comic books, as well as the direct-to-DVD movies Stargate: The Ark of Truth and Stargate: Continuum, which concluded the first television show after 10 seasons. In 2011, Stargate Universe, the last Stargate program on television, ended its run. Brad Wright announced that there were no more plans to continue the same story in further productions. In 2016, comic publisher American Mythology acquired the rights to publish new Stargate Atlantis stories set within the established franchise canon. This was expanded in 2017 to include new Stargate Universe comics as well, resolving the cliffhanger that ended the show. The predominant story arc thus ran on television for 15 years, including 17 seasons (354 episodes) of programming, and 8 comic book issues as of July 2017. However, a variety of other media either ignore this main continuity or resets it, while maintaining essential elements that define the franchise (mainly, the inclusion of a Stargate device). These include the 2002 animated series Stargate Infinity. In 2017, the franchise was revived with the announcement of a new prequel web series, Stargate Origins. Episodes premiered on a central "fan hub" for the franchise called Stargate Command, with a first season of ten 10-minute episodes.