Fringe Connections

Fauxlivia studied old Fringe cases for intel in "The Box", including Olivia's taped testimony from "Dream Logic".

When Walter explains that his red/blue lensed glasses were created by his friend from Washington, Doctor Jacoby, he's referencing the television show 'Twin Peaks' which also had an eccentric man of science, Doctor Jacoby, who wore red/blue lensed glasses very similar to Walter's.

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

Walter used the same neural halo in "The Box" as he used on the child in "Inner Child".

William Bell's name is partially faded/scratched off of the door to the lab.

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

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 entered "Martin Luther King/Eldridge Cleaver Memorial Park" which has a plaque quoting them as saying "We have a dream" rather than "I".

A seahorse can be seen on Peter's luggage.

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).

Observers send materials to themselves via shipping lanes from the future using metal cubes.

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

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".

Susan Pratt's wardrobe is full of dark colors like Olivia's and Nick Lane's.

The hand glyph can be seen on the piano stool in the Orpheum Theater in the Redverse.

Olivia had a horse-riding ribbon in Nina's old photograph in "Novation". Nina rode horses herself in "The Cure" so it stands to reason that Olivia would have done so as well in the timeline where she was raised by Nina.

Who did the Observer say was "still alive," Peter or Walter?

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

Walter had his life's work in a journal in "Black Blotter" just like he did in the fairy tale he told Ella in "Brown Betty".

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).

A seahorse can be seen on the Bishops' refrigerator.

Walternate has three solid-color panels on the wall of his office in "Bloodline": blue, red, and yellow. These symbolize the two universes (blue and red) and the rewritten timeline without Peter (yellow) starting from "Neither Here Nor There".

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