Really good episode and the ending was surprisingly sad. I knew one day they would close the gateway between both parallel universes. I just didn't think I'd be sad to see the other half disappear. It was written on the wall that Lincoln would join them as well since he has a thing for Olivia 2.0. So, not sure if they are in fact completely being written off or if they will still have separate story lines on each side since there will be no more crossing over from one side to the other. That is until the future Fringe Timeline based on last weeks episode.