Episode 17: Reckoning Part 2Goa’uld system lord Ball reveals to O’Neill that he has been taking orders from Anubis, long thought to be dead. In the face of a losing battle with the Replicators, Anubis seeks a powerful weapon that could destroy all life in the galaxy. Afraid of the consequences of such an event, Baal pleads with O’Neill to persuade Teal’c and the rebel Jaffa to destroy the temple where the weapon is buried.Episode 18: ThreadsWith a climactic battle behind them, the team turns towards personal matters. But unbeknownst to them, Anubis prepares one final attempt to take power! Meanwhile, Jackson awakens in a way station between the living world and the world of beings that have “ascended.” When he learns of Anubis’ campaign, will he ascend himself…or try to find a way back to save his friends?Episode 19: Moebius Part 1Jackson receives documents that point to the location of a ZPM in ancient Egypt. Hoping that the energy source could be used to power Earth’s defenses and open a wormhole to Atlantis, SG-1 uses an ancient time machine to travel back to 3000 B.C. But after the team locates the ZPM, Egyptians discover the time machine, and SG-1 must find a way to retake it without altering the timeline!Episode 20: Moebius Part 2SG-1’s attempt to recover a ZPM from 3000 B.C. has altered the timeline, leading to a present in which the Stargate was never discovered! The alternate-reality Carter and Jackson convince a reluctant O’Neill to take them on their first mission through the Stargate. But when the team is captured by Teal’c, once again the First Prime of Apophis, can they convince him to join their side?