 As the ship carrying Klorel and SG-1 arrives in Earth orbit, the team is captured and held prisoner. Meanwhile, the SGC has been alerted to the presence of the ship and another carrying the Goa uld Apophis. As Lt. Colonel Bert Samuels attempts to convince Hammond that his plan of launching nuclear missiles against the ships will work, SG-1 is freed by Jaffa rebel Bra tac. After Samuels plan fails, SG-1 and Bra tac race to come up with a plan to destroy both ships and stop the invasion.