Peter, Olivia, Walter, Astrid and Broyles face off against the Observers in one final and extraordinary battle for the fate of mankind.
The Fringe team engages a desperate plan as Olivia embarks on a dangerous and otherworldly journey into the unknown.
As time dramatically ticks down, Peter, Olivia and Walter stop at nothing to save the universe from Observer rule. Walter enters the infamous deprivation tank in an attempt to uncover a key piece of information about the mysterious figure, Donald. Meanwhile, Captain Windmark sets out on a revealing mission of his own as long-standing questions are answered.
The Fringe team is running out of time to save the world. As Peter, Olivia, Astrid and Walter scramble to tap into a key piece of the puzzle to defeat the Observers, they enlist the aid of Nina Sharp who conjures up a plan.
In attempt to recall a plan to defeat the Observers, Walter takes an LSD trip down memory lane. Meanwhile, Peter and Olivia trace a mysterious signal to the woods, where they come upon a grisly scene.
Olivia encounters a very intuitive and oracle-like person named Simone as she looks to recover a key piece of equipment for Walter. Meanwhile, Peter finds himself in a perilous situation as he observes Windmark.
As the fight for the future intensifies, a member of the Fringe team orchestrates a Fringe event of his own.
A Fringe team member takes on a new role, and Walter follows leads to a key piece needed in the battle against the Observers.
The Fringe team responds to recent devastating events, and a key member makes a pivotal and shocking move.
When the Fringe team tracks a lead into a hostile and heavily guarded location, Phillip Broyles resurfaces… but can he be trusted?