Stargate is an adventure military science fiction franchise, initially conceived by Roland Emmerich and Dean Devlin. The first film in the franchise was simply titled Stargate. It was originally released on October 28, 1994, by Metro-Goldwyn-Mayer and Carolco, and became a hit, grossing nearly $200 million (USD) worldwide. Three years later, Brad Wright and Jonathan Glassner created a television series titled Stargate SG-1 as a sequel to the film.
In addition to film and television, the Stargate franchise has expanded into other media, including books, video games, and comic books. These supplements to the film and television series have resulted in significant development of the show's fictional universe and mythology. In 2008, the films Stargate: The Ark of Truth and Continuum were released direct-to-DVD, which in total grossed over $21 million in Australia. In 2009, the original pilot was re-cut and released as a direct-to-DVD film. In 2002 the franchise's first animated series, Stargate Infinity, began airing, which holds no canonicity in the franchise despite its Stargate SG-1-inspired plot. In 2004, the TV series Stargate Atlantis was released as a spin off from Stargate SG-1. A third series, Stargate Universe, premiered on October 2, 2009 and was cancelled during its second season, leaving it with an unresolved cliffhanger. Then on April 17, 2011, Stargate producer Brad Wright announced that any plans for the continuation of the franchise had been cancelled indefinitely, ending 17 seasons (354 episodes) of Stargate television production.
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