Episode 1 : Children of the Gods
Colonel Jack O'Neill retired from the military a year ago. Prior to retirement, he led an expedition through the Stargate, an ancient portal which allows instantaneous travel to other galaxies. He is called back to duty by General Hammond when a group of aliens emerge from the Stargate, kill the soldiers guarding it and kidnap a female guard. After seeing the aftermath of the alien attack and the strange bodies they left behind, O'Neill confesses that he defied the order to destroy Abydos, the world he visited via the Stargate. He reveals that Daniel Jackson, the scientist who was thought to have died on that mission, is alive and living on Abydos. It is also clear that these aliens are not from Abydos. O'Neill is reunited with his old comrades Kawalsky and Ferretti and joined by Capt. Samantha Carter, an astrophysicist. SG-1 returns through the Stargate to Abydos. They discover that Jackson has taken an Abydan wife, the beautiful Sha're, and that Skaara, the young Abydan boy O'Neill cherishes as a son, has grown into a fine young man. They also see Jackson's latest discovery: a giant cartouche covered in hieroglyphics that seems to be a map of many Stargates throughout the galaxy. As they marvel, however, the aliens led by the handsome but evil Apophis, are making use of a similar map. They emerge from the Stargate on Abydos, and after a brief battle, kidnap Sha're and Skaara. Ferretti, who was wounded in the fire fight with the aliens, has seen the hieroglyphic code that indicates the alien's destination. O'Neill and Jackson are determined to follow the aliens and to save their loved ones. With a troop of soldiers from earth in tow, they track the aliens to the planet Chulak. There they discover that Sha're is now Apophis' queen; her body has been taken over by the hideous snake creatures, known as Goa'ulds, who rule this planet and collect life forms from around the galaxy to use as hosts. They know they can't save her, but can they save themselves and Skaara before they're killed by the Goa'uld guards and before General Hammond sends a nuclear weapon through the Stargate to destroy the planet?
Episode 2 : Enemy Within
As the Goa'ulds splatter against the protective iris installed inside the Stargate, the SG-1 team faces several problems close to home. Colonel Jack O'Neill wants to add a new member to the team: Teal'c, an alien who risked his own skin to save O'Neill and his team on the other side of the Stargate. But, General Hammond won't approve the appointment and O'Neill must watch as military intelligence treats Teal'c like a guinea pig. To make matters worse, Kawalsky, O'Neill's right-hand man, has been having terrible headaches caused by an alien larvae that has attached itself to his brain. What they haven't discovered is that this larvae is trying to take over Kawalsky's body in an attempt to go back through the Stargate. With guidance from Teal'c, the doctors operate to remove the alien, but did they get it in time? Or is Kawalsky still under alien control, ready to kill when the order comes?