Stargate SG-1

Stargate SG-1 was a 1997 - 2007 American/Canadian science fiction adventure television series that aired on the Showtime and SciFi (later SyFy) cable television networks. It was a television spinoff of the 1994 movie Stargate, and featured several characters from the feature film (although most were portrayed by different actors and actresses). The central plot of the series concerns a "Stargate," a device invented by ancient aliens that allows for near-instant travel between distant planets, and teams of explorers assembled by the United States government to use one such Stargate to explore the galaxy. The series starred Richard Dean Anderson, Amanda Tapping, Michael Shanks, Christopher Judge, and Don S. Davis, in addition to a large supporting cast.

Stargate SG-1 spawned several television spinoffs of its own, including Stargate Infinity, Stargate Atlantis, Stargate Univiverse, and Stargate Origins.

Children of the Gods (Season 1, Episodes 1-2)
In this two-part pilot episode, the Goa'uld leader Apophis (Peter Williams) unexpectedly comes through a Stargate that has been relocated to a US Air Force base, kidnapping Senior Airman Carol Weterings (Rachel Hayward) before retreating. The Air Force, led by General Hammond (Davis), recalls retired Colonel Jack O'Neil (Anderson) and send him through the Stargate with a team of soldiers to the desert planet Abydos (the setting of the 1994 movie). There, O'Neil reconnects with Daniel Jackson (Shanks), who chose to remain on the planet after the events of the movie, living with his Abydosian wife Sha're (Vaitiare Bandera) and her brother Skaara (Alexis Cruz). Apophis and his army also arrive on Abydos and kidnaps both Sha're and Skaara.

Back at his home base, Apophis hypnotizes Weterings, hoping to use her body as a new host for his bride Amonet. Amonet rejects Weterings, who is then killed. Apophis then selects Sha're as a possible host; this time, Amonet  approves, and Sha're is possessed by the symbiote that houses Amonet 's consciousness. Other prisoners, including Skaara, are also selected to be host bodies for other Goa'uld parasites.

Although O'Neill and his team, "SG-1" (one of nine such teams) is able to successfully rescue the non-converted Goa'uld prisoners and save them from execution, Aphosis, Sha're, and Skaara all escape. Jackson and O'Nell vow to save the two possessed Abydosians.

In the Line of Duty (Season 2, Episodes 2)
Carter is possessed by a Goa'uld named Jolinar who claims to be part of a Goa'uld resistance that is an enemy of the System Lords, and is also being hunted by an assassin that has followed her to Earth.