Fringe Connections

The Beacon from "The Arrival" appeared in "Brown Betty" as the Watchers attempted to locate Peter.

The episode ends with September going into December's apartment, apartment 513, the episode code of the next and final episode of the series.

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

Peter ran possible futures in "Five-Twenty-Ten" to try to coerce the Observers to be where he wanted them to be just like Milo Stanfield did to his doctors in "The Plateau".

There is a Massive Dynamic logo on Flight 627's engine.

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

Olivia noticed the book "Burlap Bear Goes To The Woods" in Max's room in "The Abducted". This is the same book Rachel read to Ella in "Unleashed".

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

The Glatterflug ad for daily flights to the moon in "Olivia" is the same air travel company as Flight 627 from "Pilot".

The cuneiform on the boat door says "bí".

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

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

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.

The apple 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".

Marshall Bowman had a disk in his hand like John Scott and the woman in 'The Ghost Network'.

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

Ten Observers are present on Liberty island in "The Day We Died" from an assumed total of 12, given their names. One of the missing two is August, who was killed in "August".

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

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

In "And Those We've Left Behind" Peter picked up the same toy plane (perhaps not literally the same) that he played with in "Subject 13".

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.