List of recurring Earth characters in Stargate SG-1

This is a list of recurring characters from Earth in the science fiction television show Stargate SG-1.

The Stargate Command (SGC) is a fictional military base at the (real) Cheyenne Mountain complex near Colorado Springs, Colorado. It is the main setting in Stargate SG-1 and occasionally features on Stargate Atlantis. The base extends many levels beneath the ground and is protected from most forms of attack including indirect nuclear detonations, also serving to contain biological, chemical or alien hazards to the outside world by means of a 'lockdown' status. Stargate Command is typically commanded by a General and is staffed by subject matter experts and military support personnel, several elite special operations teams, and several SG teams, including SG-1. The majority of the teams are United States Air Force with some United States Marine Corps, civilians and United States Army, but other nations have SG teams operating from the SGC as well after the events of season 5.

Captain Janet Fraiser, the resident Chief Medical Officer of the SGC (played by Teryl Rothery, seasons 1–7, 9) – She is responsible for maintaining the health of the SG teams, as well as the SGC's support staff and base personnel. On many occasions, she also cares for the health of alien refugees to Earth, including Goa'uld symbiotes. In her first appearance in "The Broca Divide", Dr. Fraiser holds the rank of captain, and is promoted to major in Season 3. In season 1's "Singularity", Fraiser adopts Cassandra, an alien orphan whose people had been exterminated by the Goa'uld System Lord Nirrti. Dr. Fraiser is killed by a staffweapon blast in season 7's "Heroes" during an off-world medical emergency, but she returns in season 9's "Ripple Effect" as a parallel universe version of Dr. Fraiser, in her reality a regular member of SG-1. Before Fraiser returns to her reality, Carter, Jackson and Teal'c are able to give her a final goodbye. Dr. Fraiser is also shown alive in an alternate timeline in the year 2010 in season 4's "2010", but Fraiser and SG-1 alter the timeline to prevent a catastrophe on Earth involving the Aschen race.

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