Fringe Connections

James Heath, a Cortexiphan subject, couldn't control his abilities in "Olivia. In the Lab. With the Revolver.". In "Over There (Part 1)" he had been trained to cure disease instead of cause it.

William Bell left Massive Dynamic to Walter.

A leaf can be seen on the bio-scan monitor at the Liberty Island security checkpoint.

In "Olivia" they gave Olivia the same tattoo as Fauxlivia had in "Over There (Part 1)".

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.

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 Fringe team is part of a full-fledged branch of the Department of Defense in the Redverse.

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

The child needed an air degradation unit in "Through the Looking Glass and What Walter Found There" because he needed a less oxygen-rich environment like where he was found underground in "Inner Child".

The briefcase contained photos of Walter.

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

The hallucinogenic drug from "The Dreamscape" was used as a weapon against the Observers in "An Enemy of Fate" to make them think they were being attacked by butterflies.

The Fringe team is the First People. Walter sent the parts of the machine back through time via the wormhole in Central Park. That's why the First People had such a knowledge of Peter and Olivia.

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

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.

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

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.

There is a Massive Dynamic logo on Flight 627's engine.

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

In "The Ghost Network" Roy had visions of the crash of Flight 627 from "Pilot", suggesting that that incident is part of a larger pattern of incidents and not a one-off event.

The Child's happy expression drops when he sees the Observer.

The seahorse glyph can be seen on the back of one of Markham's books.