You can see all of The Observer's other appearances here.




UPDATE: Here is official confirmation of the Observer's location.






The next episode clue from Fringe Episode 110 Safe can be found at the bar in Cambridge, while Peter is showing Olivia a card trick. On the wall is a sign that reads "The Colds" — a reference to the slugs in Fringe Episode 111 Bound, which were a supersized version common cold virus.





