The dark haired guy that gets in the elevator with Olivia? The camera shows him just a little bit before zooming in on Olivia, but she gives him a sideways look like she has strange feeling about him.

Then, when Olivia, Walter and Peter are in the hallway of the FBI building, the same guy passes them and this time he is looking at Olivia with a strange look, but she doesn't see him this time.

Just wondering. Does anyone have screencaps?