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This is Season 4, Episode 10, which comes after the last
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In this episode, a young teen is unable to stop the visions she has of pending fatal events. She catches the attention of the Fringe team and is able to stop a mass casualty event just before it occurs. Meanwhile, Olivia grows wary of the ominous warning she received from The Observer as Peter's insights allow him to take the lead in the investigation.
Synopsis provided by the Fandom Wiki, Fringepedia, and Wikipedia.
The Observer can be seen watching Olivia's apartment as she and Nina are inside.
Timestamp: 42:52
Signage for "Mallum Insurance" in 'Enemy of My Enemy' foreshadows the story of the Mallum family in 'Forced Perspective'.
Timestamp: 19:40
FRINGE DIVISION CASE FILE #410-12712
FRINGE EVENT: Precognitive ability to see death before it happens
CLASSIFIED CASE CONNECTION(S): N/A
AGENTS ASSIGNED: Dunham, Lee
SUPERVISING AGENT: Broyles
FILE ARCHIVED BY: André Ferreira, Serena Graziani
WITNESSES/CONTACTS: Jayne Reynar, Jim and Diane Mallum (parents), Danny Mallum (sibling), Albert Duncan (suspect)
LOCATION: Tanner Park, Boston, MA; Allston Courthouse, MA
VICTIM(S): Emily Mallum (deceased), Robert Englehart (deceased), Judge O'Malley
CASE REPORT SUMMARY:
S3E10
Timestamp: 12:34
Walter hypnotized Roscoe Joyce in "The Firefly".