Olivia makes an unceremonious return from her visit to the alternate reality. Peter, Amy and Charlie race to locate an anonymous hostile force bent on eliminating one of the science team. Walter and Astrid return to the lab to isolate a bit of fringe science - and prepare for Peter’s birthday. Broyles and Nina find their way to Washington D.C. to face congressional scrutiny and defend the Fringe Division.
Discuss the episode here in the comments. What did you think of the season premiere? Was it worth the wait?