Fringe Connections

The 'green-green-green-red' pattern from "The Equation" is seen on Donald's Observer communication device in "August".

One of the envelopes Peter sorted through said "Thank you for your support!", a direct message from the creators of Fringe to all the fans.

A seahorse can be seen hanging from the taxi when Walter listens to music.

Walter implanted a tracker in his neck in "Snakehead" which is used in "Grey Matters".

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

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

The ship at the end of "Nothing as it Seems" shows creatures like the Porcupine Man from "The Transformation".

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

A leaf can be seen on the bio-scan monitor at the Liberty Island security checkpoint.

Walter's car in "The Same Old Story" has a severed hand in a jar, and Peter jokes "Friend of yours?". Walter eventually cuts William Bell's hand out of amber in "Letters of Transit".

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

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

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

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

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

In "Black Blotter" Walter had a vision of his scuffle with Nina at Reiden Lake from "Peter" and later recalled other memories from that day.

The Child's happy expression drops when he sees the Observer.

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

When Peter left the hospital in "The Last Sam Weiss" he wrote "I am going home" on an envelope, the same phrase he wrote for Elizabeth in "Subject 13" when he tried to return to his home world.

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'.

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

Cecil mentions the Observers using a light bomb in "Through the Looking Glass and what Walter Found There", which is what Loyalists threw at Peter in the sewer tunnels in "The Bullet that Saved the World".

Jones said there are 10 tests for Olivia in total. The first was a box of lights that Olivia had to turn off with her mind.

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