Over its decade of existence,

science fiction Science fiction (sometimes shortened to Sci-Fi or SF) is a genre of speculative fiction which typically deals with imagination, imaginative and futuristic concepts such as advanced science and technology, space exploration, time travel, Paral ...

TV series ''

Stargate SG-1 ''Stargate SG-1'' (often stylized in all caps, or abbreviated ''SG-1'') is a military science fiction adventure television series within Metro-Goldwyn-Mayer's ''Stargate'' franchise. The show, created by Brad Wright and Jonathan Glassner, is ...

'' developed an extensive and detailed backdrop of diverse characters. Many of the characters are members of alien species discovered while exploring the galaxy through the

Stargate ''Stargate'' (often stylized in all caps) is a military science fiction media franchise based on the film directed by Roland Emmerich, which he co-wrote with producer Dean Devlin. The franchise is based on the idea of an alien Einstein–Rosen b ...

, although there are an equal number of characters from offworld human civilizations. While ''Stargate SG-1'', ''

Stargate Atlantis ''Stargate Atlantis'' (usually stylized in all caps and often abbreviated ''SGA'') is an Adventure film, adventure and military science fiction television series and part of MGM's Stargate, ''Stargate'' franchise. The show was created by Brad Wr ...

'' and ''

Stargate Universe ''Stargate Universe'' (often abbreviated as ''SGU'') is a military science fiction television series and part of MGM's ''Stargate'' franchise. It follows the adventures of a present-day, multinational exploration team traveling on the Ancient ...

'' are separate shows, they take part in the same

fictional universe A fictional universe, or fictional world, is a self-consistent setting with events, and often other elements, that differ from the real world. It may also be called an imagined, constructed, or fictional realm (or world). Fictional universes ma ...

, so no character is internally show-specific.

Main characters

Except for the commanders of the top-secret

Stargate Command Over its decade of existence, science fiction TV series ''Stargate SG-1'' developed an extensive and detailed backdrop of diverse characters. Many of the characters are members of alien species discovered while exploring the galaxy through the S ...

military base (SGC), all main characters of ''Stargate SG-1'' are members of the SG-1 team, the primary unit of the SGC in the show. SG-1's duties include

first contact First contact may refer to: *First contact (astronomy), t