Fringe: Season 5

Young observer remains muted. The team seeks Nina Sharp's help to understand him, but the mission is compromised.

As the Observers close in, Walter and September desperately work to complete the plan, but one obstacle after another hinders their progress.

Young Observer's origin is revealed. And his existence and an additional time travel are necessary to change the history of Observers' invasion.

The team retrieves another cassette tape from the amber. With Nina Sharp's help, the team recovers 2 cylinders. While Peter works independently to score a minor victory against the Observers, Olivia ascertains Peter's secret.

In 2036 the Observers have begun terraforming the earth. Walter has a plan to defeat them but his capture by the Observers may be problematic. Peter searches for Olivia who is encased in amber to reunite his family

Walter retrieves another video tape from the amber and it leads the team into a pocket universe.

Peter, in the grip of mourning Henrietta's death, resorts to extreme measures in order to gain powers that will allow him to surpass those that the Observers possess and hopefully, and eventually, find a means to defeat them.

An act of kindness by Peter draws attention to Etta. The Observers deal with an infiltrator, and we learn of a resistance leader known as the Dove and, coincidentally, that Phillip Broyles is working with the Observers.

Walter Bishop opens Pandora's Box. He finds a young Observer once he has hidden in the Pocket Universe.

As the Observers evaluate Michael and begin to learn of his abilities and potential, Olivia embarks on a dangerous quest to rescue him.

Harvard is now a secret observer installation. But Walter remembers a secret entrance that will give him access to his lab and perhaps a way to recover his plan to rid the world of the Observers. Olivia gets a distasteful look at Observer interrogation methods as Etta questions a loyalist security guard in hopes of finding a way to restore power to the lab. As Olivia and Etta disagree on how to dispose of their captive they gain a greater appreciation of each others character.

Following the bread crumbs, Olivia collects a truck with cargo from a scrap yard but runs into bounty hunters. Peter, with newly gained powers, has to make a decision.

After piecing together the videos of Walter's plan, Olivia, Peter, Walter and Etta head to rural Pennsylvania to retrieve essential materials for the plan. There, they encounter a group of archivists who may be able to help with some local obstacles.