Fringe (season 4)
The fourth season of the American science fiction television series Fringe premiered on Fox on September 23, 2011 and concluded on May 11, 2012, consisting of 22 episodes. The series is produced by Bad Robot Productions in association with Warner Bros. Television. The show was officially renewed for a fourth season on March 24, 2011.
Season summary
Peter's actions of using the Wave Form Device to create a bridge between the two universes have caused him to erase himself from the timeline; a new timeline, in which young Peter was not saved by September after falling through the ice of Reiden Lake in 1985 after Walter's crossing, is set in motion. Despite the absence of Peter, the bridge has created a healing effect on the parallel universe, and both Fringe teams resolve their former differences and work together on cases.
Olivia and a more sheltered Walter continue to explore Fringe events, but are aware of a memory of Peter that haunts them. Due to their actions, Peter suddenly materializes in this timeline, though his identity is not initially known nor is he trusted. However, as he spends time with the Fringe team, Olivia starts to gain memories of the original timeline, and though both are initially worried about this effect, allow it to continue on, rediscovering their romance from before. During one case, a wounded September appears to Olivia, warning her that she dies in every future that he can see, before disappearing. September later appears to Peter after he activates a strange artifact, which acted like a homing beacon to September. September explains the other Observers hid this universe from him purposely, and that this timeline is Peter's true home.
