Fringe Connections

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".

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

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

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".

Madison Square Garden in the Redverse is quarantined in amber.

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

Agent Jessup was relating season 1 Fringe cases to Bible verses in "A New Day in the Old Town". In "Nothing as it Seems", creatures can be seen on something resembling Noah's Ark.

All of the people in Olivia's mind wear blacks and greys because Cortexiphan subjects have a strong desire to blend in.

The butterfly glyph can be seen outside the entrance to the daycare center.

Etta clutched her necklace, a bullet, when she saw Walter for the first time and when talking about her parents in "Letters of Transit". This is the bullet Walter shot at Olivia in "Brave New World (Part 2)".

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

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

Jones presented Olivia with the light box test in "The End of All Things" just as he did in "Ability".

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

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

Olivia saw Brandon as a zombie in her mind in "Lysergic Acid Diethylamide" because he wanted to cut out and study her brain in "Entrada".

The crane that crashed during the intro has a Massive Dynamic logo on it.

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

The super-sized cold virus from "Bound" was used as a weapon against the Observers in "An Enemy of Fate".

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.

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

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

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