Differences

The Timeline without Peter

Listed below are all the differences between the main timeline (seasons 1-3) and the timeline without Peter (season 4), arranged by episode and with pictures and timestamps wherever appropriate.
  • 26 differences
  • 9 episodes
  • S4E01→S4E18


S4E01 — Neither Here Nor There

5 differences 2 pictured

  • Olivia was still kidnapped and held in the Redverse while Fauxlivia impersonated her in the Blueverse.
  • S4E01: Astrid 14:11
    Astrid was a field agent.
  • S4E01: Walter's room in the lab 42:38
    Walter was afraid to leave the lab.
  • John Scott died during the Flight 627 investigation; Walter couldn't save him.
  • Olivia checked Walter out from the institution.

S4E02 — One Night in October

4 differences 1 pictured

  • Fauxlivia was still with Frank.
  • Charlie married Bug Lady from 'Immortality'.
  • Olivia killed her stepfather as a child.
  • S4E02: Alt Broyles 27:05
    Alt Broyles was still alive.

S4E03 — Alone in the World

1 difference 1 pictured

  • S4E03: Walter's evaluations 01:10
    Monthly evaluations by the director of St. Claire's were a condition for Walter's release from the institution.

S4E04 — Subject 9

6 differences 1 pictured

  • Walter hated Nina because he blamed her for breaking the vial with the cure for Peter's disease which ultimately led to the kidnapping and Peter's death.
  • Olivia ran away from the Cortexiphan trials.
  • Bell is still dead.
  • Elizabeth committed suicide after both Peters died.
  • S4E04: Cameron James 36:48
    Olivia hadn't heard about/from any of the other Cortexiphan subjects until Cameron James.
  • Olivia had never heard of Reiden Lake.

S4E05 — Novation

5 differences 1 pictured

  • Peter drowned when he and Walter crashed through the ice on Reiden Lake because the Observer never saved him.
  • S4E05: Photo of Olivia in Nina's office 12:29
    Nina raised Olivia and Rachel. Their mother had died, Olivia had killed their abusive stepfather, and Nina stepped in to raise them before they could be put into the foster system.
  • The team (aside from Peter) don't know about the Observers.
  • Peter was supposed to die in both universes on that night in 1985 before the Observer's interventions.
  • Olivia had a horse-riding ribbon.

S4E08 — Back to Where You've Never Been

2 differences 1 pictured

  • Olivia had no idea she could cross between universes.
  • S4E08: David Robert Jones 41:26
    David Robert Jones is alive.

S4E16 — Nothing As It Seems

1 difference

  • Rachel is still married and has two kids, Ella and Eddie.

S4E17 — Everything in Its Right Place

1 difference 1 pictured

  • S4E17: USSR 04:30
    The USSR still exists in the Redverse.

S4E18 — The Consultant

1 difference 1 pictured

  • S4E18: Alt Lincoln's father 01:47
    Alt Lincoln's father was still alive. Walternate had mentioned the passing of Alt Lincoln's father in the original timeline.