Fringe Connections

The ship at the end of "Nothing as it Seems" showed the creatures from "Snakehead".

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

September's device in "A Short Story About Love" led Peter to the beacon from "The Arrival".

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

The merged wall paintings from "Jacksonville" were 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".

A butterfly can be seen painted on the side of a white trash can.

In "Grey Matters" Walter's brain pieces were stored the heads of living people. In "Letters of Transit", in the altered timeline, they were stored in Massive Dynamic.

Nick Lane's wardrobe is all dark colors like Olivia's.

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

The translucent skin toxin from "Pilot" was used as a weapon against the Observers in "An Enemy of Fate".

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).

Butterflies can be seen in Olivia's bedroom.

Michael played the music box from "The Boy Must Live" for September after September got shot in "An Enemy of Fate".

Madison Square Garden in the Redverse is quarantined in amber.

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

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

William Bell left Massive Dynamic to Walter.

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

Peter ran possible futures in "Five-Twenty-Ten" to try to coerce the Observers to be where he wanted them to be just like Milo Stanfield did to his doctors in "The Plateau".

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

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