Fringe Connections

Walter stole Bell's hand in "Letters of Transit" to gain access to Bell's personal storage unit in "Five-Twenty-Ten".

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

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

Walter thought of Peter when he saw the image of a coffin in "Grey Matters" because his Peter died in "Peter".

The opening crawl is an homage to Blade Runner.

A butterfly can be seen attacking Mark Young.

In "Liberty" the Fringe team used the universe window from "Peter" to help them rescue Michael.

Olivia struck James Heath with a candlestick in her dining room, making the title a complete red herring.

A frog can be seen in Walter's Monty Python trip.

Walter sent Peter the white tulip note from "White Tulip" in the mail and Peter received it in "An Enemy of Fate" after the future was successfully altered.

William Bell left Massive Dynamic to Walter.

The flower glyph can be seen on the wall in Karen Truss's house.

Broyles was hanging out at a jazz bar in "Midnight". His character in "Brown Betty" performs in one.

Michael can show emotion as he cried when he saw Nina's dead body.

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

In "Entrada" Fauxlivia was brought back to the Redverse via harmonic transfer with small rods injected into her hands, similar to the harmonic transfer that brought the bridge over in "The Man from the Other Side".

This episode reveals that there is more than one Observer. The intro sequence since the pilot episode has had a single frame that says "OBSERVERS ARE HERE".

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

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).

When Walter explains that his red/blue lensed glasses were created by his friend from Washington, Doctor Jacoby, he's referencing the television show 'Twin Peaks' which also had an eccentric man of science, Doctor Jacoby, who wore red/blue lensed glasses very similar to Walter's.

The leaf glyph is on the electronic keypad at Massive Dynamic.

The merged wall paintings from "Jacksonville" were seen in Walter's storage vault in "The Bullet that Saved the World".

Madison Square Garden in the Redverse is quarantined in amber.

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