Fringe Connections

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".

Windmark said "Nothing grows from scorched earth" to Walter and then later Walter saw a dandelion growing from rubble outside. He has hope.

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

Olivia's pregnancy dream in "The Same Old Story" is in a waiting area with giant tulips.

Olivia pulled up a list of the frozen heads found in S02E04 'Momentum Deferred' and they were all marked with "2E204", a reference to the episode in which they were stolen.

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

Michael played the music box from "The Boy Must Live" for September after September got shot in "An Enemy of Fate".

William Bell's name is partially faded/scratched off of the door to the lab.

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

Walter hid the beacon at the tombstone of his father, Robert Bishop, in "The Arrival". Robert Bishop's work and history is central to the plot of "The Bishop Revival".

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

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

Walternate has three solid-color panels on the wall of his office in "Bloodline": blue, red, and yellow. These symbolize the two universes (blue and red) and the rewritten timeline without Peter (yellow) starting from "Neither Here Nor There".

The briefcase contained photos of Walter.

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

A bus at the second crime scene in "The Plateau" has an ad on the side that says "Ambered", a reference to the ambered bus in "The Ghost Network".

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

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

In "The Cure" David Esterbrook has an aleph pin on his jacket that can also be seen on the canoe from Olivia's dreamscape in "Pilot".

Donald entered the mine 5 weeks after the invasion and took some rocks. He was described as being in his late 30s, medium height, dark hair. Donald said he was waiting for "a colleague, a scientist from Boston, to meet him." Observers found him and took him away.

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

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".

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 hand can be seen on the wall when Olivia and Peter attack the Observers and Loyalists.