What an important moment! What an important episode! Not only do we learn of Sydney's true love for Vaughn in this episode, but it's our first tip that Michael Vaughn may not be who he says he is.
Mr. Yager is investigating Vaughn for unauthorized trips and suspicious contact with enemies of the United States. He asks Sydney to tap Vaughn's computer and download all the information she can. Sydney refuses and proves her loyalty for Vaughn...sort of. She follows him to a bar (good song playing, Lucinda Williams "Righteously") where she witnesses him purchase information from an ex-KGB assassin. Vaughn explains that he has been researching Irina and her activity. He has come up with nothing. Vaughn is cleared and he and Sydney agree- no more secrets. HA!
Going back to this episode with hindsight, it's interesting to watch Vaughn's behavior and his facial expressions when Sydney asks him if he is hiding something. He says he's not comfortable telling her all his secrets, as they have just started dating- but as Sydney says later, "Who do you think you work for?" In my mind, I like to think there is a connection between this instance of Vaughn's betrayal and his research with Renee. It would have made sense to me, as a writer, to draw the audience back to this episode to justify Vaughn's "double life" in season 5. If we learned anything from this episode, it's that Vaughn can keep a secret.
I love Sydney in this episode and I love Vaughn in this episode. When she catches him at the bar, his facial expression is PERFECT, I laugh every time. It's like, "Oh, crap!"