Synopsis:
Sydney attempts to save Vaughn from Sark's virus by stealing the antidote but the mission is botched and she is captured. She makes a deal with Sark to deliver Sloane into his hands, though doing so means Sloane's death, in exchange for her life and the antidote. Sark instead makes a deal with Sloane taking Sydney by surprise and unsure of her cover status. Meanwhile, the arrival of Vaughn's girlfriend shocks Syd and Will finds evidence that the standardized tests he has been investigating for Vaughn may have been a KGB tool.
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