Fringe Connections

Nina communicated with William Bell through the universe window from "Peter" in "Brown Betty".

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

The radioactive isotope compound from "The Cure" that caused heads to explode was used as a weapon against the Observers in "An Enemy of Fate".

When Nina looks in Bell's storage room for his copy of the First People book the camera pans by a copy of 'Dr. Spock's Baby and Childcare'.

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

The creature from "Snakehead" and images of it were seen in Walter's storage vault in "The Bullet that Saved the World".

The flower glyph glitches away after the scene where Olivia's fear caused her to interrupt all the electronics in the room.

A seahorse can be seen outside the entrance to the daycare center.

The ship at the end of "Nothing as it Seems" shows creatures from "Unleashed" in cages.

Bell stole Walter's David Bowie album 'The Man Who Sold the World', which describes what Bell did multiple times for his own benefit.

The butterfly glyph can be seen as Olivia and Shapeshifter Charlie fight in the alley.

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

In his dream at the end, young Peter is in bed wearing a jersey with the number 96 on it. The number 96 is the same jersey number that Joshua Jackson wore as Charlie Conway in the Mighty Ducks trilogy.

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

Walter used the same neural halo in "The Box" as he used on the child in "Inner Child".

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

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

Walter's password at Massive Dynamic in "Letters of Transit" is 0-5-2-0-1-0, the same as the combination to the Jacksonville daycare center and to Bell's safe in "Five-Twenty-Ten".

The Fringe team is part of a full-fledged branch of the Department of Defense in the Redverse.

A flower can be seen outside the entrance to the daycare center.

Markham took a liking to Olivia when they met for the first time in "Ability". Decades later in "Transilience Thought Unifier Model-11" he buys her when she's stuck in amber.

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

A hand can be seen outside the entrance to the daycare center.