Fringe Connections

The blue powder dispersal doll from "Concentrate and Ask Again" was seen in Walter's storage vault in "The Bullet that Saved the World".

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

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

Sam Weiss died 10-15 years earlier in a shootout with Observers trying to protect the radio signal relay used to locate Michael.

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

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

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

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

Nina communicated with an animated William Bell in "Brown Betty". When Walter and Peter found Bell in Olivia's mind in "Lysergic Acid Diethylamide" he was animated.

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

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.

William Bell left Massive Dynamic to Walter.

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

The 'green-green-green-red' pattern from "The Equation" appeared on the Amber dispersal device when it was initially activated in "6B".

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

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

In "Back to Where You've Never Been" Peter and Lincoln set up the universe portal in the Orpheum Theater, the same place Walter, Olivia, and the Cortexiphan subjects crossed over to rescue Peter in "Over There (Part 1)".

Jones is working with Bell, who is alive.

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

A butterfly shadow box like those seen in "The Dreamscape" was seen in Walter's storage vault in "The Bullet that Saved the World".

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