Fringe Connections

Olivia has excellent aim in "Bound"; she killed Loeb's wife with a single shot to the head. It's stated in "Olivia" that Fauxlivia won an Olympic gold medal for marksmanship.

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

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

The creature from "Snakehead" and images of it were seen in Walter's storage vault in "The Bullet that Saved the World".

This episode reveals that there is more than one Observer. The intro sequence since the pilot episode has had a single frame that says "OBSERVERS ARE HERE".

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

The password to retrieve Michael in "Black Blotter", "Black Umbrella", came from the poster for Singin' in the Rain, from which September chose his new name (Donald O'Connor) in "The Boy Must Live".

Michael can show emotion as he cried when he saw Nina's dead body.

A butterfly can be seen attacking Mark Young.

Walter used the clapper to turn on the lights in "In Absentia". He installed it in "Midnight".

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 leaf glyph is on the electronic keypad at Massive Dynamic.

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.

Jones is working with Bell, who is alive.

The apple glyph can be seen on the backrest of a chair in the lab.

The tombstone in Olivia's dream state in "Pilot" says "He's Not Dead", possibly referring to John Scott, assumed dead, who appears at the end of "The Arrival".

When Nina looks in Bell's storage room for his copy of the First People book the camera pans by a copy of 'Dr. Spock's Baby and Childcare'.

Butterflies can be seen in Etta's apartment.

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".

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 hanging from the taxi when Walter listens to music.

Peter found Olivia in a field of white tulips in "Subject 13", a nod to "White Tulip".

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 a door in the pocket universe.