Stargate SG-1 (often abbreviated as SG-1) is a science fiction television series, part of the Stargate franchise. It begins one year after the events of the 1994 science fiction film Stargate. It was produced in and around Vancouver, Canada.

In the Stargate science fiction universe, a network of ancient alien devices called Stargates connect the far reaches of the Milky Way, Pegasus and Ori galaxies, opening the door for near-instantaneous interstellar travel. Stargate SG-1 chronicles the exploits of SG-1, the "flagship team" of at least 25 teams who explore the galaxy and defend Earth against alien threats such as the Goa'uld, Replicators and later the Ori.

The series is currently broadcast in several countries around the world; in some places, such as Europe, North America, Japan, Latin America and Australia, the series is broadcast in HD.

In 2007, after completion of the series run, Stargate SG-1 was named as number 28 on TV Guide's list of "The 30 Top Cult Shows Ever".

Stargate refers to the science fiction media franchise 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.

The franchise, owned by MGM, continues to be successful years after its inception. 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).

Stargate productions center on the premise of a "Stargate", a ring-shaped alien device that creates a wormhole enabling personal teleportation to complementary devices located cosmic distances away. FAQ Section Most Stargate episodes are set in the present day. The United States civilian government holds the Stargate's existence a secret, so story lines present no contradiction between the episode's events and reality. In the story, many Earth mythologies are in fact based upon events involving aliens who visited or controlled Earth civilizations in the distant past. Although initially the only hostile alien race depicted, the Goa'uld (as they become known in SG-1) become utmost among a series of Earth foes in subsequent franchise incarnations. Posing as gods, the Goa'uld enslaved the inhabitants of ancient Egypt, creating its culture and religion, using Stargates to move laborers from Earth to other habitable planets. The aliens were forced to flee Earth following a successful rebellion by the humans, and the Stargate was buried and forgotten until its rediscovery in Giza in 1928.

General Hammond summons Colonel Jack O'Neill out of retirement to embark on a secret rescue mission. O'Neill confesses that he disobeyed orders to destroy the Stargate on Planet Abydos, and that scientist Daniel Jackson may still be alive. Arriving on Abydos with his team, O'Neill meets up once again with the scientist, who has discovered a giant elaborate cartouche in hieroglyphics. All signs point to the fact that this is a map of many Stargates that exist throughout the galaxy - a development that makes the dream of the SG-1 team to travel throughout the universe in time a reality. Written by Sean Fitzgibbons