Fringe Connections

In "The Box" Bell wrote to Nina in his will "And for the precious few we had alone in Tuscany, a memento of me." In "Five-Twenty-Ten" Bell's old safe had a picture of Nina in Tuscany.

The opening crawl is an homage to Blade Runner.

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

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".

Walter's pose as he listens to the Mozart Requiem is a reference to the iconic Maxell tape advertisement from the '80s.

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

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

The cuneiform on the boat door says "bí".

Butterflies can be seen in Etta's apartment.

When Peter drove up to the lake house in "There's More Than One of Everything" the camera focused on his car through a red panel of stained glass, foreshadowing that Peter was taken from the Redverse in "Peter".

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).

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

Ten Observers are present on Liberty island in "The Day We Died" from an assumed total of 12. One of the missing two Observers might be John Mosley, a potential former Observer, who was killed in "The Arrival". See the FAQs for more information (note: FAQs contain spoilers through season 5).

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

A frog can be seen in Walter's Monty Python trip.

Walter gave the Child M&Ms in the pocket universe in "Through the Looking Glass and What Walter Found There" because he ate them with Olivia in "Inner Child".

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

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

The super-sized cold virus from "Bound" was used as a weapon against the Observers 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.

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

The anti-gravity osmium bullets from "Os" were used as a weapon against the Observers and Loyalists in "An Enemy of Fate".

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.

The butterfly glyph can be seen outside the entrance to the daycare center.