[[caption-width-right:350:The show's main cast from season 1 through 8, left to right; [[BadassBookworm Major Samantha Carter,]] [[MilitaryMaverick Colonel Jack O'Neill,]] [[DefectorfromDecadence Teal'c,]] [[AdventurerArchaeologist Dr. Daniel Jackson]] and [[AFathertoHisMen General George Hammond]].]]

''Stargate SG-1'' is a ScienceFiction television series ([[LongRunner 1997-2007]]) following the ''Film/{{Stargate}}'' movie in a BroadStrokes fashion. It focuses on the adventures of the U.S. Air Force's primary exploration and FirstContact team, designated ''SG-1'', as they travel through a [[FasterThanLightTravel wormhole]] to alien planets. The series dealt heavily with the Egyptian-mythology base of the original film, but as the series progressed it expanded to cover other mythologies and different alien threats and allies. This series is responsible for the elaborate expansion of the Franchise/StargateVerse.

The Stargates are a PortalNetwork left behind by {{Precursors}}: dial the code for the planet you want to visit, step into the gate, and emerge moments later from an identical gate on the other side of the galaxy. As SG-1 explores other worlds they find that AllMythsAreTrue, at least in the form of AncientAstronauts. Their primary foe throughout the series is the Goa'uld, a race of {{Puppeteer Parasite}}s who were worshipped on Earth as the [[AncientEgypt Egyptian Gods]].

Lasting for 10 seasons, it was the longest-running single Sci-Fi show in US history and is only surpassed worldwide by ''Series/DoctorWho'' and ''Franchise/SuperSentai''.[[note]]''Series/{{Smallville}}'' has five more episodes than SG-1, but YMMV on its genre[[/note]] Despite the constant threat of cancellation from the 6th season on, and the fear of each SeasonFinale supposedly being the last, it came as a surprise when the show was not renewed for an 11th season almost immediately after it broke the previous American length record held by ''Series/TheXFiles'' (later taken by ''Series/{{Supernatural}}'' in 2016). Two [[DirectToVideo full-length DVD movies]] have been made (''Film/TheArkOfTruth'' and ''[[Film/StargateContinuum Continuum]]''). The third and final SG-1 film, ''Stargate: Revolution'', is in DevelopmentHell; following the failure of the third SpinOff series, ''Series/StargateUniverse'', Creator/{{MGM}} is unwilling to produce any more Stargate material for the foreseeable future, and the film has been indefinitely mothballed with no plans to resume production.

2013 has seen the release of an {{iOS game|s}}, ''Stargate SG-1 Unleashed'', featuring the voices of the surviving original cast.

As the protagonists are primarily modern-day Americans, ''Stargate'''s earthling characters rarely suffer from GenreBlindness. The main characters are very aware of the trappings of science fiction, and are not afraid to show it.

Spinoffs: ''Series/StargateAtlantis'', ''Series/StargateUniverse'', the animated [[CanonDisContinuity non-canon]] ''WesternAnimation/StargateInfinity'', and the {{prequel}} ''Series/StargateOrigins''. For more info, see Franchise/StargateVerse.
!!''Stargate SG-1'' provides examples of:

* [[StargateSG1/AToF Tropes A-F]]
* [[StargateSG1/GToL Tropes G-L]]
* [[StargateSG1/MToR Tropes M-R]]
* [[StargateSG1/SToZ Tropes S-Z]]
* [[ShoutOut/StargateSG1 Shout Outs]]
->''"These and other clichés will be available to you all for one more day of training with me. After that, you'll either be assigned to an SG team... or not."''