Fringe Connections

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.

Peter's shared dream state with September looks like an observation deck.

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

Peter said "You're going to be fine" to Olivia in "Brown Betty", like Charlie's "You're gonna be fine" message to Olivia in "Dream Logic".

The green and yellow posters in the diner represent how this new timeline with the yellow/amber title sequence is starting to merge with the original timeline with the blue title sequence now that Peter has returned (blue + yellow = green).

A seahorse can be seen on Peter's luggage.

The creatures from "Snakehead" were used as a weapon against the Observers and Loyalists in "An Enemy of Fate".

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

A frog can be seen on the dock when Walter is high.

Simon Foster was trapped in amber in "Letters of Transit" and the Observers were experimenting on Simon's head in the Ministry of Science in "In Absentia".

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.

The universe window from "Peter" was seen in Walter's storage vault in "The Bullet that Saved the World".

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 leaf glyph is on the electronic keypad at Massive Dynamic.

The combination to Bell's safe in "Concentrate and Ask Again" was 0-5-2-0-1-0, the same combination used in "Five-Twenty-Ten".

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 seahorse glyph can be seen on the back of one of Markham's books.

In "The Ghost Network" Roy had visions of the crash of Flight 627 from "Pilot", suggesting that that incident is part of a larger pattern of incidents and not a one-off event.

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 on the wall in the diner where Olivia and Lincoln meet.

Olivia has excellent aim in "Bound"; she killed Loeb's wife with a single shot to the head. It's stated in "Olivia" that Fauxlivia won an Olympic gold medal for marksmanship.

All of the people in Olivia's mind wear blacks and greys because Cortexiphan subjects have a strong desire to blend in.

Butterflies can be seen on a box in September's apartment.