Huge error in the ending.[]
so they suceed and the observers are never created. but then that would mean September would not be there to distract Walternate from seeing that he suceeded in creating the cure for Peter. Meaning Walter would have no reason for crossing over and taking Peter to our side, and Peter and Olivia would not be together and Henrietta certainly would have never been concieved.
The timeline wasn't reset until 2015, as Walter suggests. That's why he wasn't erased until 2015. The reason is this: The Observers (specifically, September) were instrumental in crafting the plan that would rid the world of Observers. If the Observers were erased right away, then the timeline would continue on as usual and Walter's Plan would never be created, meaning in 2167 the scientists will create the Observers and then send them back in time to repeatedly loop everything we've seen over the course of five seaons. Instead, though, as Walter explains in "An Enemy of Fate," "Nature abhors a paradox." Nature will instead course correct everything at the exact moment in time it is able to do so. Fringe is one big time loop over and over again. Nature needs to close the time loop. It does so by allowing the Observers to exist up until 2015. Walter and September create the Plan between 2012 and 2015. They do all the things that are necessary to set up the plan and once they have fulfilled that purpose, then they can be erased. Erasing them all right away would create a paradox in itself. At the moment of the Invasion, nature finally erases all of the Observers and Walter. The reason Walter is considered a paradox is because his Season 5 Experiences are required to fulfill the plan (in addition to the 1985-2015 experiences of Seasons 1-4.) However, since the plan is to undo his Season 5 Experiences, this will create a paradox. Instead, Walter is erased from time at the exact moment of the Invasion, the exact moment when his Season 5 Experiences began, so that his crucial 2036 moments are not erased as well in the reset overriden in the reset. Finally, in 2167, his Season 5 Version, that was only allowed to continue to exist because he was erased earlier appears in 2167. This, in effect, closes the loop, and sets time on a linear path. The Season 5 Versions of everyone (Olivia, Peter, Astrid, etc.) are all erased in the reset, except for Walter and Michael. 24.34.36.158 15:03, February 8, 2013 (UTC)