The year is 2036 and the overpowering Observers rule. The Fringe team, preserved in amber for 20 years, is now a rebel resistance team fighting for freedom. Peter, reunited with his now-adult daughter, Etta, sets out to find out what happened to Olivia as they start their mission to save the world from the Observers.
Synopsis provided by the Fandom Wiki, Fringepedia, and Wikipedia.
This episode's glyphs spell:
The Fringe team, particularly Walter, doubted they were up to the enormous challenges facing them.
Observers are featured in this episode.
Unknown
The dragon poster in the marketplace in 'Transilience Thought Unifier Model-11' hints at the painted dragon in the steam tunnels in 'In Absentia' that guided the Fringe team back into the Harvard lab.
Later, Walter commented on the value of music.
In "Transilience Thought Unifier Model-11" Walter's brain was partitioned to keep Observers from reading his mind and learning his plan to combat them.
Peter had flashbacks of literally losing Etta in "Transilience Thought Unifier Model-11".
In "Immortality" Walternate had a Japanese mistress named Reiko. (Image 1)
The Fringe team acquired stones from a mine in "The Recordist". (Image 1)
A Reward Wire billboard showing Walter as a wanted fugitive can be seen in "The Human Kind." (Image 1)