Fringe Connections

September loads his food with heat (pepper, jalapenos, hot sauce) in "The Arrival" because his emotions are dulled, as he explained in "The Boy Must Live".

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

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

The creatures from "Snakehead" were used as a weapon against the Observers and Loyalists in "An Enemy of Fate".

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

Butterflies can be seen in Olivia's bedroom.

A flashback at the end of "Grey Matters" revealed that it was William Bell who removed the pieces of Walter's brain. In "Over There (Part 2)" Bell said he removed the pieces at Walter's own request due to fears about the man he was becoming.

The flower glyph glitches away after the scene where Olivia's fear caused her to interrupt all the electronics in the room.

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

In "The End of All Things" September said that he made a mistake when he distracted Walternate in his lab in "Peter" and saving Walter and Peter from the icy lake was an attempt to rectify that mistake.

The Redverse traded Alt Broyles for Fauxlivia by cutting off one of his legs to make their masses equal.

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, given their names. One of the missing two is August, who was killed in "August".

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

A hand can be seen on the wall when Olivia and Peter attack the Observers and Loyalists.

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".

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 is on the electronic keypad at Massive Dynamic.

The posters from Peter's Redverse bedroom in "Subject 13" were hung on the wall when Walternate took him back in "Over There (Part 2)" in order to bring a sense of comfort and familiarity to Peter.

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

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

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

There are 'Wanted' billboards for the Fringe team.

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