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Stargate Atlantis is an American/Canadian science fiction television program part of the Stargate franchise. It is a spin-off from the television series Stargate SG-1, which was based on the film Stargate (1994). Produced by MGM, Stargate Atlantis premiered on the US Sci Fi Channel on July 16 (Sky One in Europe), 2004 with "Rising", a movie-style two-part episode, that guest starred Richard Dean Anderson and Michael Shanks from Stargate SG-1.