Fringe Connections

Ten Observers are present on Liberty island in "The Day We Died" from an assumed total of 12. One of the missing two Observers might be John Mosley, a potential former Observer, who was killed in "The Arrival". See the FAQs for more information (note: FAQs contain spoilers through season 5).

Jones said there are 10 tests for Olivia in total. The first was a box of lights that Olivia had to turn off with her mind.

The frog glyph can be seen on a door in the pocket universe.

Cecil mentions the Observers using a light bomb in "Through the Looking Glass and what Walter Found There", which is what Loyalists threw at Peter in the sewer tunnels in "The Bullet that Saved the World".

The briefcase contained photos of Walter.

A butterfly can be seen painted on the side of a white trash can.

Nina communicated with an animated William Bell in "Brown Betty". When Walter and Peter found Bell in Olivia's mind in "Lysergic Acid Diethylamide" he was animated.

All of the people in Olivia's mind wear blacks and greys because Cortexiphan subjects have a strong desire to blend in.

The butterfly glyph can be seen near Lincoln in the rail yard.

The ship at the end of "Brave New World (Part 2)" showed the creatures from "Snakehead".

It is true that the Empire State Building's spire really was initially designed for airship docking as it was in the Redverse.

The seahorse glyph can be seen on the back of one of Markham's books.

Walter visited Peter's grave in "There's More Than One of Everything" from when Peter died in "Peter".

Carr's work review sent to Astrid from his previous employer shows that in the three years prior to his dismissal, he only missed three days of work. He was out for only one day each year and each year it was the same day: Valentine's Day.

A seahorse can be seen hanging from the taxi when Walter listens to music.

The Fringe team used the skin-growth toxin from "Ability" as a weapon against the Observers and Loyalists in "The Bullet that Saved the World".

Sam Weiss died 10-15 years earlier in a shootout with Observers trying to protect the radio signal relay used to locate Michael.

A frog can be seen on the dock when Walter is high.

Walter said that Nancy Lewis looked familiar in "The Road Not Taken"; her name is on a height chart in the daycare center where the Cortexiphan trials took place in "Jacksonville".

The license plate on Olivia's SUV reads 1R2D21, and the licence plate on Broyles's SUV reads 1C3PO1.

Butterflies can be seen on a box in September's apartment.

In "Olivia" they gave Olivia the same tattoo as Fauxlivia had in "Over There (Part 1)".

Peter's grave says he died when he was 7.

The apple glyph can be seen on the backrest of a chair in the lab.