| description | Character |
|---|
| Ori follower, Vala's husband | |
| leader of Lucian Alliance | |
| symbiote to human host Jacob Carter | |
| astrophysicist and member of SG-1 | |
| Jaffa and member of SG-1 | |
| new leader of SGC | |
| chief medical officer of SGC after Janet dies | |
| Nox woman who befriends Daniel | |
| Unas who kidnaps then befriends Daniel | |
| Vala's daughter, Orici | |
| Sergeant and technician at SGC | |
| President of US when Anubis attacks | |
| human alien former Goa'uld host and later SG-1 member | |
| Jaffa, former first first prime of Apophis | |
| ascended Ancient who helps the humans | |
| Goa'uld system lord, ruled earth 5000 years ago | |
| civilian scientist st SGC | |
| colonel and member of NID | |
| Goa'uld system lord, posed as Satan | |
| Goa'uld inside Jaffa Shan'auc convinces her to release him | |
| Tollen who befriends Sam | |
| | description | Character |
|---|
| member of NID and later IOA | |
| Goa'uld, takes over Sarah | |
| police detective develops relationship with Sam | |
| Goa'uld imprisoned on earth, takes over males of SGC | |
| Goa'uld system lord, killed by Teal'c for killing his father | |
| boy from Abydos, befriends Jack | |
| Tok'ra scientist and historian, human host is Freya | |
| Jaffa son of Teal'c | |
| human from Langara, joins SG-1 temporarily | |
| Jaffa leader of Sodan | |
| civilian scientist, former research assistant to Daniel who later joins SGC | |
| replicator who creates a replicator Sam | |
| Goa'uld system lord, creates several clones of himself | |
| Goa'uld system lord, main enemy in beginning | |
| technician who operates the stargate | |
| woman who acquired Eye of Ra amulet during the excavation of the stargate | |
| colonel who joins SG-1 and O'Neill leaves | |
| Jaffa first prime of Montu, first leader of Free Jaffa Nation | |
| Goa'uld system lord, experimented on humans to create better host | |
| supreme commander of the Asgard | |
| NID liaison to SGC | |
| | description | Character |
|---|
| wealthy civilian, gets implanted by Goa'uld to cure illness | |
| ascended Ancient who helps Daniel ascend | |
| USAF officer went of first SG-1 mission | |
| Ancient high councilor of Atlantis, helps defeat the Ori | |
| son of Sha're, Harcesis child | |
| Major stationed at Pentagon, liases with SGC | |
| human alien who crashes on earth , created TV show about SGC | |
| archaeologist and member of SG-1 | |
| outcast Ancient who helps Sam, returns in child form | |
| leader of SG-1 | |
| Tok'ra who takes over Samantha temporarily | |
| human host to Lantash, forms a relationship with Sam | |
| leader of the SGC | |
| senator and later vice president | |
| chief medical officer of the SGC | |
| half ascended Goa'uld system lord | |
| first human to go through stargate, fiance to Catherine | |
| Daniel's wife from Abydos | |
| young survivor of doomed planet, adopted by Janet | |
| civilian scientist, thinks he smarter than everyone | |
|
