https://www.reddit.com/r/fringe/comments/1sbyvg0/trying_to_spot_them_on_rewatch/
The Observers on FRINGE are very MIB like.
https://tvtropes.org/pmwiki/pmwiki.php/Characters/FringeObservers
https://www.reddit.com/r/fringe/comments/19azk5r/observers_in_every_episode/
https://tropedia.fandom.com/wiki/Fringe/Characters/Observers#September
https://fringe.fandom.com/wiki/September#Altering_The_Timeline
https://en.wikipedia.org/wiki/Mythology_of_Fringe#Alternate_timelines
The Observers seem to move through time and space like its all a big interactive recording to them.
https://medium.com/@quantumglyphs1/the-observer-effect-how-observing-changes-reality-0202abadcaf8
https://en.wikipedia.org/wiki/Observer_effect_(physics)
bhttps://en.wikipedia.org/wiki/Observer_(special_relativity)
https://en.wikipedia.org/wiki/Observer_(quantum_physics)
https://www.sciencedaily.com/releases/1998/02/980227055013.htm
What is Schrödinger's Cat? | Neil deGrasse Tyson Explains... https://www.youtube.com/watch?v=keiFzYJbfdw
https://en.wikipedia.org/wiki/Mythology_of_Fringe#Observers
https://fringeconnections.com/characters?name=observers
4 Reasons Fringe's Observers Are Like the Borg https://www.youtube.com/watch?v=W3afjauIxvY