Fringe Connections

In "And Those We've Left Behind" Peter picked up the same toy plane (perhaps not literally the same) that he played with in "Subject 13".

Olivia pulled up a list of the frozen heads found in S02E04 'Momentum Deferred' and they were all marked with "2E204", a reference to the episode in which they were stolen.

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

The Franklin St. Station subway sign in "Amber 31422" shows the numbers 6-9-5-5 in the 'green-green-green-red' circle pattern from "The Equation".

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

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

Walter had the Cortexiphan subjects stand in a circle around him to activate their abilities in "Over There (Part 1)" just like he did when they were children in "Subject 13".

The license plate on Olivia's SUV reads 1R2D21, and the licence plate on Broyles's SUV reads 1C3PO1.

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

William Bell had a bell on his desk in "There's More Than One of Everything" and rang it after he introduced himself to Olivia. He left a similar bell to Nina in his will in "The Box".

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.

Butterflies can be seen on a box in September's apartment.

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.

Jones is working with Bell, who is alive.

Butterflies can be seen in Etta's apartment.

Olivia's pregnancy dream in "The Same Old Story" is in a waiting area with giant tulips. Young Olivia fled to a field with white tulips when she got scared in "Subject 13".

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

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

Despite Walternate's efforts to mold Olivia's mind into Fauxlivia's, Olivia kept seeing Peter and Walter in "Amber 31422". Similarly, in "Alone in the World" Peter didn't exist in the rewritten timeline yet Olivia kept having visions of him.

Bell stole Walter's David Bowie album 'The Man Who Sold the World', which describes what Bell did multiple times for his own benefit.

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

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".

There are 'Wanted' billboards for the Fringe team.

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