Fringe Connections

The translucent skin toxin from "Pilot" was used as a weapon against the Observers in "An Enemy of Fate".

Mark Young's colleague is wearing a butterfly pin, possibly prompting the subject of his hallucination.

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

Walter shot Olivia in the head in "Brave new World (Part 2)" like Walternate did in the possible future in "The Day We Died".

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

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

Walter used the clapper to turn on the lights in "In Absentia". He installed it in "Midnight".

Nick Lane's wardrobe is all dark colors like Olivia's.

Butterflies can be seen in Etta's apartment.

When Peter drove up to the lake house in "There's More Than One of Everything" the camera focused on his car through a red panel of stained glass, foreshadowing that Peter was taken from the Redverse in "Peter".

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

The butterfly glyph can be seen on the wall in the diner where Olivia and Lincoln meet.

The Observer's binoculars in "The Arrival" have the green-green-green red pattern from "The Equation" at the bottom left corner.

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

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

The rollercoaster seen from atop the World Trade Center in Olivia's mind in "Lysergic Acid Diethylamide" is a reference to the one she rode with Ella in "August".

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

A seahorse 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.

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

A butterfly can be seen attacking Mark Young.

The super-sized cold virus from "Bound" was used as a weapon against the Observers in "An Enemy of Fate".

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

Butterflies can be seen in Olivia's bedroom.