Fringe's The Observer Appearances

The central mystery of JJ Abrams' Fringe is something called "The Pattern" which is a generic name for all the odd events the heroes of the series investigate each week. An aspect of those events is a bald white man that has the nickname of "The Observer" whose job seems to be to record those events that "The Pattern" influences. The character played by Michael Cerveris, is almost a regular on the series as he pops up briefly in multiple episodes. The below compilation of appearances is a good test on the eyes to see if you spot him before the video shows him. What role he has in the series remains to be seen.