Fringe Connections

The child needed an air degradation unit in "Through the Looking Glass and What Walter Found There" because he needed a less oxygen-rich environment like where he was found underground in "Inner Child".

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

A butterfly can be seen on a lampshade near the front of Olivia's apartment.

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.

Peter's grave says he died when he was 7.

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

Walter stole Bell's hand in "Letters of Transit" to gain access to Bell's personal storage unit in "Five-Twenty-Ten".

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 the back of one of Markham's books.

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 episode opened in "Manhatan", seemingly a typo but actually signifying this was an alternate Manhattan.

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

Olivia's therapist in "Nothing as it Seems" is the same one she had when she was trapped on the other side in "Olivia".

Susan Pratt's wardrobe is full of dark colors like Olivia's and Nick Lane's.

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

The Fringe team used the skin-growth toxin from "Ability" as a weapon against the Observers and Loyalists in "The Bullet that Saved the World".

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

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

Olivia saw Brandon as a zombie in her mind in "Lysergic Acid Diethylamide" because he wanted to cut out and study her brain in "Entrada".

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

Joseph Meegar is able to control electronics around him in "Power Hungry" like the Observers can, such as August starting a car with his finger in "August".

Jones is working with Bell, who is alive.

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