Fringe Connections

Peter said "You're going to be fine" to Olivia in "Brown Betty", like Charlie's "You're gonna be fine" message to Olivia in "Dream Logic".

Sam Weiss died 10-15 years earlier in a shootout with Observers trying to protect the radio signal relay used to locate Michael.

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

The blue powder dispersal doll from "Concentrate and Ask Again" was seen in Walter's storage vault in "The Bullet that Saved the World".

Donald helped Walter set up the pocket universe hiding spot.

A butterfly can be seen attacking Mark Young.

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.

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

The butterfly glyph can be seen on the wall in the diner where Olivia and Lincoln meet.

Joseph Meegar is able to control electronics around him in "Power Hungry" like the Observers can, such as August starting a car with his finger in "August".

There are 'Wanted' billboards for the Fringe team.

Butterflies can be seen on a box in September's apartment.

The radioactive isotope compound from "The Cure" that caused heads to explode was used as a weapon against the Observers in "An Enemy of Fate".

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 seahorse can be seen on the Bishops' refrigerator.

Nina said that Bell was a father figure to Jones in "There's More Than One of Everything". They finally worked together in "Brave New World (Part 1)".

The episode ends with September going into December's apartment, apartment 513, the episode code of the next and final episode of the series.

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

Despite Walternate's efforts to mold Olivia's mind into Fauxlivia's, Olivia kept seeing Peter and Walter in "Amber 31422". Similarly, in "Alone in the World" Peter didn't exist in the rewritten timeline yet Olivia kept having visions of him.

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

A butterfly can be seen on a lampshade near the front of Olivia's apartment.

Walter sent Peter the white tulip note from "White Tulip" in the mail and Peter received it in "An Enemy of Fate" after the future was successfully altered.

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

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