President Robert Kinsey (Ronny Cox) approaches Weir, expressing in no uncertain terms the undesirability of interfering with his agenda. As SG-1 retreat back to Earth, General Hammond tells them that he is being replaced. Dr. Weir arrives to a less than happy reception as she ceases all Stargate operations. Not long after, Teal'c's mentor Bra'tac (Tony Amendola) comes through the Stargate with the news that Anubis' fleet will arrive at Earth in three days. Kinsey believes this to be a ploy to keep the SGC running, but Weir hears out SG-1's proposal to find the Lost City of the Ancients, and with it the means to defend Earth. Bra'tac and Teal'c depart for Chulak, to find ships and warriors to aid in Earth's defense. Part 2 O'Neill, under the influence of Ancient knowledge, writes down what Daniel believes is the location of the Lost City: Praclarush Taonas. Daniel realizes that there is a syllable in the Ancient language for each Stargate symbol, and thus "Praclarush Taonas" is a Stargate address. Unable to make a Stargate connection to Praclarush Taonas, Sam (Amanda Tapping) instead plots the planet's location and SG-1 sets off in a Goa'uld cargo ship along with Bra'tac and a young Jaffa pilot named Ronan. Jack's condition is worsening; his actions are becoming more and more subconscious, and he is losing the ability to communicate. He gives command of the mission to Carter. They arrive at a molten planet and discover Taonas, an Ancient outpost, buried under hardened lava. O'Neill activates a hologram showing Terra Atlantus—Earth and the Lost City of Atlantis, buried in Antarctica. O'Neill removes an advanced power source from the outpost. In orbit, Bra'tac fights and successfully kills Ronan who was not a Rebel Jaffa but actually an agent working for Anubis. During the fight, Bra'tac is wounded; O'Neill heals him using the healing powers of the Ancients, then enhances the cargo ship's hyperdrive and modifies its ring transporter to be able to melt through ice upon reaching their destination at Antarctica. Anubis' scouts reach Earth, but General Hammond and President Hayes believe he is attempting to probe Earth's status and hold back launching their only defence, the Prometheus. As Anubis' full force arrive in orbit, they destroy a fleet of US Navy ships, before turning their attention to Earth's communications network. Anubis appears as a hologram inside the Oval Office and demands Earth's surrender. Still