Dominion

"Dominion" is the nineteenth episode of the tenth season of Stargate SG-1.

Plot
Because Adria is able to sense deception within others, Vala has hatched a plan: SG-1 implants false memories into Vala, detailing her escaping from the SGC, as they had turned against her. Because Vala believes that these memories are entirely real, Adria does not realize that it is part of a deception. When Vala leads her in search of the Clava Thessara Infinitas, and take her to the planet SG-1 ambushes them with Prior disruptors to stop Adria from using her powers. However, Ba'al's Jaffa beam in and kidnap Adria.

Ba'al reveals that he is going to take control of her armies by implanting her with a symbiote. SG-1 rescues her (killing a Ba'al clone), but realize that the symbiote, Ba'al, has already taken Adria as a host and controls her. He attempts to buy time to overcome the Prior disruptor, offering the information that the Ori are truly dead. When SG-1 informs him that they plan to swap him with a Tok'ra symbiote, he tells them it would not be strong enough to suppress Adria's personality. He also threatens to kill her instead of allowing them to succeed.

When the Tok'ra arrive and try to remove Ba'al, he releases a neurotoxin into Adria's bloodstream, leaving her on her deathbed, too weak to be blended with the Tok'ra symbiote. They try to kill her with a larger toxin dose while she is unconscious, but she wakes up and throws Daniel and the guards across the room.

Knowing that she is dying, Adria seals herself in the infirmary with Vala. Using her Ori telekinetic powers to hold the doors closed, she begins preparations for ascension. Mitchell and Teal'c attempt to cut their way in, but are distracted when Adria releases coolant into the corridor where Daniel is trapped. Vala attempts to kill Adria with one of the guard's guns, but is lifted into the air by Adria's telekinetic powers, allowing her to complete the ascension process uninterrupted.

SG-1 is left speculating whether the Ori are dead as Ba'al said, thereby leaving all their former power to Adria, or whether Adria has joined them in their crusade. Vala however points out that, whether or not the Ori are still alive, they have dealt a heavy blow to the invading armies by depriving them of their leader.

Goofs

 * The wires coming out of Adria's shirt disappear and reappear throughout the final confrontation.
 * When SG1 are in the Oydessy, in the scene where Mitchell talks to Vala, Carter trips on her chair.