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Sydney finds clues about the 2 years that she can not remember from Simon Walker, the leader of a group that collect deadly weapons. During Sydney's mission, Vaughn becomes worried about Sydney, and feels confusion about his feelings towards Lauren. Also, Jack tells Dixon Sydney's secret to help her.
Sloane: (to Lauren) I must admit, I was concerned for you when Sydney resurfaced. I remembered seeing her with Vaughn: their relationship reminded me of my own with my late wife. It was the kind of bond even death cannot sever. Hmmm, well apparently I misjudged.
Sydney: I can't afford to make a distinction between professional and personal - not in my life. I mean, this job took two years from me. Everything is personal.
Marshall enters Vaughn's height as 1.60 meters which is 5'3", when he is really 6'0" (1.83 meters).
When Sydney steals the diamond necklace, she puts it around her ankle, but when she is jumping off the balcony there is no necklace. Then in the second shot of the pool scene, the necklace reappears on her left ankle, but in the van it moves to her right.