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Season guide

9-1-1: Season 4

14 episodes Premiered Jan 18, 2021 Updated Oct 1, 2026

The fourth season of the television series 9-1-1 continues the overarching saga across a total of fourteen episodes. As the emergency response team navigates various high-stakes crises and personal challenges, the narrative builds upon the established lives of the first responders and dispatchers. Operating within a high-pressure environment, the characters must rely on their professional training, teamwork, and resi

Previously on 9-1-1

Season 4 Lore Primer

Key plot threads, lore context, and character stakes you need to remember before diving into this season.

  • ⚡ The series follows the professional and personal lives of first responders including firefighters and dispatchers.
  • ⚡ Emergency personnel handle high-pressure rescue operations and crises across fourteen-episode blocks.
  • ⚡ The team relies on teamwork, training, and resilience to manage unexpected incidents.
  • ⚡ Interpersonal dynamics among department members continue to develop throughout the ongoing saga.
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Season overview

The fourth season of the television series 9-1-1 continues the overarching saga across a total of fourteen episodes. As the emergency response team navigates various high-stakes crises and personal challenges, the narrative builds upon the established lives of the first responders and dispatchers. Operating within a high-pressure environment, the characters must rely on their professional training, teamwork, and resilience to handle emergency situations throughout the fourteen-episode run. The season further develops the interpersonal dynamics among the department members while they face demanding rescue operations and unexpected incidents in their daily work.

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Season 4 Episodes

Episode Guide

🛡️ SPOILER SHIELD

Season 4 Progress Shield

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Binge Efficiency Engine

Season 4: Filler vs. Essential Canon

Filter episodes by narrative weight. Focus on essential mytharc and skip standalone side quests.

36%
64%
Mytharc (5): Crucial lore & season climaxes
Core (9): Character development & subplots
Side Quest (0): Standalone / filler
S4·E1 Mytharc

The New Abnormal

Jan 18, 2021 · 43 min

The Hollywood Reservoir dam breaks. The team adjusts to life during the pandemic.

S4·E2 Core

Alone Together

Jan 25, 2021 · 43 min

In the aftermath of the dam break, massive mudslides wreak havoc throughout Los Angeles.

S4·E3 Core

Future Tense

Feb 1, 2021 · 43 min

The 118 race to save a man under siege by his high-tech smart home, and a yoga teacher who has lost her vision. Athena hunts down a bank robber disguised by Covid protocols. Meanwh

S4·E4 Core

9-1-1, What's Your Grievance?

Feb 8, 2021 · 43 min

Athena investigates a mysterious murder during a neighborhood block party and the 118 rush to save lives endangered by a bomb threat. Meanwhile, Chimney has a hard time keeping sec

S4·E5 Mytharc

Buck Begins

Feb 15, 2021 · 43 min

The 118 race to save the lives of workers trapped in a five-alarm factory fire. Meanwhile, Maddie reveals a painful family secret that causes Buck to confront his childhood and ans

S4·E6 Core

Jinx

Feb 22, 2021 · 43 min

The 118 believes their fabled firehouse superstition has come true when they have the day from hell with a never-ending series of bizarre emergency calls - Athena is in hot pursuit

S4·E7 Core

There Goes the Neighborhood

Mar 1, 2021 · 43 min

The 118 rush to save a man pinned under a Humvee, and a garage band that rocks out too hard. Enlisting Bobby and Athena's help, Michael installs a new "rear window," and turns into

S4·E8 Core

Breaking Point

Mar 8, 2021 · 43 min

The 118 are called to the tarmac when a flight attendant reaches her limit with her flight's passengers. Athena discovers that quarantine has pushed a couple to their breaking poin

S4·E9 Core

Blindsided

Apr 19, 2021 · 43 min

Athena and the 118 race to save lives after a drunk driver causes a deadly pile-up on the freeway. Meanwhile, Maddie goes into labor and Hen and Karen are devastated as they prepar

S4·E10 Core

Parenthood

Apr 26, 2021 · 43 min

The 118 responds to a series of calls dealing with parents and their children, including a disastrous birthday party thrown by a mommy blogger. Meanwhile, Athena and Michael talk t

S4·E11 Core

First Responders

May 3, 2021 · 43 min

The members of the 118 rush to the site of a hit-and-run that leaves a familiar face in critical condition. Meanwhile, with Buck's help, Athena investigates the case of a missing w

S4·E12 Mytharc

Treasure Hunt

May 10, 2021 · 43 min

When a famous mystery writer dies, Athena, Bobby and the 118 respond to the chaos caused by a city-wide manhunt for buried treasure the author left behind.

S4·E13 Mytharc

Suspicion

May 17, 2021 · 43 min

The members of the 118 make calls to save a bridezilla at a disastrous wedding and to a mother trapped on her balcony. Meanwhile, Hen plays medical detective when her mother, Toni,

S4·E14 Mytharc

Survivors

May 24, 2021 · 43 min

In the aftermath of the shooting, Athena and the 118 are on high alert when a sniper is targeting members of the LAFD. Meanwhile, Maddie makes a life decision. Season finale

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