I am re-posting my Observer find with an update…thank you to Linda and laachi for finding two other possible Observer sightings.
I originally thought this wass the Observer, but I could not find any other screenshot that had his face or figure. J.J. Abrams is getting very good at hiding him. If anyone has found a better shot of him, please let me know.
Here is a screenshot, as per Linda’s great score…I think she might be on to something. I’m not sure how he got into the FBI building unnoticed, but he looks directly at Olivia, which is more in keeping with his MO.
laachi has noticed this shot at Loeb’s house, just before Olivia knocks on the door…