The Day We Died

The Day We Died

Season 3, Episode 22
Aired: May 6th, 2011
Written By: Akiva Goldsman, J. H. Wyman, Jeff Pinkner
Directed By: Joe Chappelle

Recaps: Fandom Wiki | Fringepedia | AV Club
Resources: IMDb | Wikipedia | Transcript
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Learn: Science Olympiad Lesson Plan


This episode follows the aftermath of Peter entering and activating the doomsday device. He finds himself 15 years in the future; though the device has destroyed the parallel universe, his universe is nevertheless gradually disintegrating. Peter comes to realize the background of the doomsday device and wakes up in 2011. After getting the two universes to agree to work together, he inexplicably disappears.

Synopsis provided by the Fandom Wiki, Fringepedia, and Wikipedia.


This episode's glyphs spell:


Peter disappeared from existence after bridging both universes.

Glyph symbol NGlyph symbol OGlyph symbol MGlyph symbol OGlyph symbol RGlyph symbol E
Glyph symbol N
Glyph symbol O
Glyph symbol M
Glyph symbol O
Glyph symbol R
Glyph symbol E


Ten Observers can be seen on Liberty Island after Peter is erased.



Previous Episode Clue

The ID number "2026" on the squad car in 'The Last Sam Weiss' foreshadows Peter's experiences in the year 2026 in 'The Day We Died'.

Previous episode clue

Next Episode Clue

Painted text in a parking space in 'The Day We Died' says "ONLY SEPT". In 'Neither Here Nor There' Peter's fate is once again in September's hands as he's the only Observer who has any desire to prevent Peter from being fully erased.

Next episode clue


  • Walter said the weapon technology is 10-15 years ahead of its time because it actually comes from Walternate/Redverse.
  • Walternate met Peter at their old lakehouse at Reiden Lake.
  • 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. (Image 1)
  • Peter experienced the entire vision in 60 seconds.
  • Peter has disappeared. (Image 2)
Item of interest: Central Park wormhole
Image 1
Central Park wormhole
Item of interest: Peter disappeared
Image 2
Peter disappeared




  • The destroyed Orpheum Theater has an ad for a show called Rocket Poppeteers. Rocket Poppeteers was also a fictional popsicle brand used as part of the marketing for Super 8. (Image 1)
Item of interest: Rocket Poppeteers
Image 1
Rocket Poppeteers


  • The year is 2026. (Image 1)
  • There is a Fringe Division. (Image 2)
  • Ella is a Fringe Division agent. (Image 3)
  • They have suborbital tours. (Image 4)
  • The wormhole in Central Park led to the late Paleozoic era (roughly 250 million years ago). (Image 5)
  • Walter had a stroke that affected the right side of his body. (Image 6)
  • They have kappa radiation.
  • Walter is in jail for his crimes. (Image 7)
  • There's a vortex on the River Thames. (Image 8)
  • Broyles is a senator. (Image 9)
  • Olivia and Peter are married.
  • Olivia can control her telekinetic abilities. (Image 10)
  • The Redverse was destroyed by a wormhole, presumably created by The Machine.
  • Walternate is behind the attacks. (Image 11)
  • Walternate came to the Blueverse on a mercy mission to try to save his world and got stuck here when the Redverse was destroyed.
  • Walternate killed Olivia. (Image 12)
  • Steak comes in cans. (Image 13)
  • The former Federal Building in Boston is now Fringe HQ. (Image 14)
Redverse: <b>Image 1:</b> The year 2026
Image 1: The year 2026
Redverse: <b>Image 2:</b> Fringe Division
Image 2: Fringe Division
Redverse: <b>Image 3:</b> Agent Ella Dunham
Image 3: Agent Ella Dunham
Redverse: <b>Image 4:</b> Suborbital tours
Image 4: Suborbital tours
Redverse: <b>Image 5:</b> Wormhole
Image 5: Wormhole
Redverse: <b>Image 6:</b> Walter suffered a stroke
Image 6: Walter suffered a stroke
Redverse: <b>Image 7:</b> Walter in jail
Image 7: Walter in jail
Redverse: <b>Image 8:</b> Vortex on the Thames
Image 8: Vortex on the Thames
Redverse: <b>Image 9:</b> Senator Philip Broyles
Image 9: Senator Philip Broyles
Redverse: <b>Image 10:</b> Olivia's abilities
Image 10: Olivia's abilities
Redverse: <b>Image 11:</b> Walternate
Image 11: Walternate
Redverse: <b>Image 12:</b> Walternate killed Olivia
Image 12: Walternate killed Olivia
Redverse: <b>Image 13:</b> Canned steak
Image 13: Canned steak
Redverse: <b>Image 14:</b> Fringe HQ
Image 14: Fringe HQ


Walter ate a Red Vine.
Walter's Food: Red Vine
Red Vine


"It's a paradox. I can't change what happens because it's already happened, but, you can make a different choice within what happened. I simply need to find a way to bring your consciousness forward to now so that you can witness what will happen if you make the same choice. Peter, for all I know it could be happening already. Don't you see? We can fix everything! We can cheat the rules of time!"
"I understand now. I understand what the machine does. I know what it's capable of and I know where it came from."
"The First People."
"Yes, the First People, Walter, but the First People are us. You, most specifically. And maybe Ella and Astrid, I don't know. I don't know who it was that took the machine back through time. But I know something else. I've seen doomsday and it is worse than anything you could possibly imagine. This isn't a war that can be won. Our two worlds are inextricable. If one side dies, we all die. So I've torn holes in both the universes and they lead here, to this room. A bridge so that we can begin to work together to fix-"
"You were right. They don't remember Peter."
The Observer:
"How could they? He never existed. He served his purpose."


A visualization of all the ways this episode connects to other episodes. Scroll down to see the actual connections.
Connection chart: The Day We Died


S1E04 - The Arrival

  • 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). (Image 1)
Connection: Ten Observers
Image 1
S3E22 - The Day We Died
Ten Observers

S2E08 - August

  • 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". (Image 1)
Connection: Ten Observers
Image 1
S3E22 - The Day We Died
Ten Observers

S2E19 - Brown Betty

  • Ella (in "Brown Betty"):
    "We played games kind of badly. Then Uncle Walter told me a story."

    Roughly 15 years later Ella was a Fringe agent.

    Walter (in "The Day We Died"):
    "You used to call me 'Uncle Walter', remember?"
    "I don't remember much from before it got bad."

S2E21 - Over There (Part 1)

  • The End-of-Dayers targeted the Orpheum Theater in "The Day We Died", a soft spot from when Olivia and the other Cortexiphan subjects crossed over to get Peter in "Over There (Part 1)". (Image 1)
Connection: Orpheum Theater attack
Image 1
S3E22 - The Day We Died
Orpheum Theater attack

S2E22 - Over There (Part 2)

  • Peter (in "Over There (Part 2)"):
    "I don't know what you heard about me, but changing the laws of physics might be slightly above my abilities."

    In "The Day We Died" Peter used the Machine to rip holes in both universes and bridge them together.


S3E01 - Olivia

  • Peter offered to "save" Senator Van Horn's pen with a special trick when it was just about out of ink in "Olivia". Van Horn laughed at him for caring to save a pen and then Van Horn just let it die. This foreshadowed Peter's attitude toward the Redverse in "The Day We Died" where he found a way to save the alternate universe and fix its problems rather than let it continue to decay and ultimately die.

S3E06 - 6955 kHz

  • Markham (about the radio transmissions in "6955 kHz"):
    "First of all, they're as old as dirt. They say when Marconi invented the radio, the first thing he heard was the numbers, like they were floating around in space just waiting for someone to listen."
    "So you're trying to tell me that Marconi picked up a transmission before humans invented the technology to send one?"
    "Creepy, right?"

    In "The Day We Died" Peter explained that the Fringe team from 2026 sent the pieces of The Machine to the past, explaining how there could be technology broadcasting radio signals before the radio was invented.


S3E21 - The Last Sam Weiss

  • Walter (in "The Last Sam Weiss"):
    "I have known you for a long time, Olivia, and I believe that the drawing was no accident. Whoever did it knew the same as I do: that you don't fail."

    In "The Day We Died" Peter revealed that the person responsible for the drawings and The Machine was Walter himself.


S4E22 - Brave New World (Part 2)

  • Walter shot Olivia in the head in "Brave new World (Part 2)" like Walternate did in the possible future in "The Day We Died". (Image 1, 2)
Connection: Olivia shot
Image 1
S3E22 - The Day We Died
Olivia shot
Connection: Olivia shot
Image 2
S4E22 - Brave New World (Part 2)
Olivia shot

S5E04 - The Bullet that Saved the World

  • The End-of-Dayers used light bombs called Electrilights in "The Day We Died". Loyalists threw a light bomb at Peter in the sewer tunnels in "The Bullet that Saved the World". (Image 1, 2)
Connection: Electrilight
Image 1
S3E22 - The Day We Died
Connection: Light bomb
Image 2
S5E04 - The Bullet That Saved the World
Light bomb