Everything That Rises Must Converge

Below is a quick image that i have sketched out for some co-workers. This is what is going on with the Theoretical Physics behind the show.

It is my position that they will simply cross back over in the final episode. They will first all wake up and then consult with Eloise and Daniel (who there is no logical explanation for the presence of in that timeline). We will see a missing chunk of Daniel and Desmond in the limo talking too...

Basically, the timeline did not fork, it split like a thread of many layers connected at both ends... more like a band though... there is elasticity to it. This is one working hypothesis of Quantum Physics for what would happen in such Time-Travel.