Dominion

S10, E19: Believing Vala (Claudia Black) to have escaped imprisonment by the IOA after being deemed too large a risk Adria (Morena Baccarin) hopes to finally ally alongside her mother. The two attempt to uncover the Clava Thessara Infinitas storehouse of infinite ancient treasure only to learn the address and Vala's memories are just an elaborate trap by SG-1 to capture Adria. The tables quickly turn as the team themselves are ambushed and Adria taken captive by Ba'al (Cliff Simon). The team quickly scrambles to locate Ba'al and retake Adria in the hopes of either convincing her to leave the galaxy with her army or have her killed. Intel of a meeting of Ba'al's forces reveals that the real Ba'al has killed off all of his clones. While on Ba'al's ship he explains to Adria he plans to implant her with his symbiote to take control of her body and therefore of her army. SG-1 aboard the Odyssey track Ba'al's ship and are able to retake Adria and kill Ba'al at the same time. However back aboard the Odyssey they learn they might have been too late as Ba'al's symbiote is already in control of Adria. With no other way SG-1 brings in the Toakra to remove Ba'al's symbiote and implant Adria with one of their own in hopes to use Adria's body to command the Ori out of the galaxy. Ba'al being true to form doesn't go easily injecting Adria's nervous system with a slow acting toxin. Adria back in control fights to keep herself alive long enough to ascend but with SG-1 trapped outside the operating room it's up Vala to kill her own daughter before she can ascend to join the Ori.