Ep 14. The Shroud

SG-1 continues their search for the Ark of Truth. The Odyssey returns from the planet with news that they have found another ancient device similar to the Ark. SG-1 travels to the planet and discovers that the planet is inhabited by caves of people with a unique ability. One of these people, Adria, is a follower of the Ori and has the power to control others.

Meanwhile, Gerak, the leader of the Jaffa Nation, arrives on Earth to request the Ark of Truth for use against the Ori. The IOA refuses to give it to him, citing potential dangers if it falls into the wrong hands. Gerak leaves in anger, but later sends an emissary offering to trade their knowledge of the Ori in exchange for the Ark.

SG-1 is torn over the decision to give up the Ark, but ultimately decides to take the trade. SG-1 sets up the exchange on the planet where the device was found, but it turns into a trap. Adria has taken control of Gerak and plans to use the Ark to convert all of Earth to her religion.

SG-1 and Gerak's Jaffa soldiers team up to defeat Adria. There is a tense stand-off in the temple where the Ark is located, with both sides using their strengths to try to gain control. In the end, SG-1 is successful in stopping Adria and destroying the temple. Gerak sacrifices himself to save the team, and the Jaffa Nation is left without a leader.

Back on Earth, SG-1 turns over the knowledge of the Ori to the IOA in exchange for their protection against future Ori attacks. The episode ends with the team setting off to continue their search for the Ark of Truth and to uncover the mysteries of the ancient device they found on the planet.