Fringe Connections

John Mosley's beanie in "The Arrival" has the 'green-green-green-red pattern' from "The Equation".

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

Butterflies can be seen in Olivia's bedroom.

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

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.

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

The bus in "The Ghost Network" is ambered. Ambering later becomes a real safety tool used by the other side as seen in "Over There (Part 1)".

Olivia struck James Heath with a candlestick in her dining room, making the title a complete red herring.

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

Walter checked Peter's eyes for signs of degradation in "Pilot". Jones's eyes showed signs of changing in "There's More Than One of Everything" after he was teleported out of prison.

Madison Square Garden in the Redverse is quarantined in amber.

A butterfly can be seen attacking Mark Young.

Parts of Officer Gillespie from "Fracture" were seen in Walter's storage vault in "The Bullet that Saved the World".

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

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

There was a white tulip in Walternate's bedroom in "Immortality" when he was struggling with what he had to do to save his world, suggesting that the symbol has meaning for him just like it did for Walter in "White Tulip".

One of the envelopes Peter sorted through said "Thank you for your support!", a direct message from the creators of Fringe to all the fans.

A seahorse can be seen on the Bishops' refrigerator.

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.

Windmark visited his boss, The Commander, in 2609.

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

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.

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