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Season guide

ER: Season 15

22 episodes Premiered Sep 25, 2008 Updated Sep 25, 2026
Previously on ER

Season 15 Lore Primer

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

  • ⚡ Directly follows the overarching narrative developments of ER Season 14.
  • ⚡ Faction dynamics and core character alliances shift under escalating external stakes.
  • ⚡ Crucial mysteries introduced previously reach key turning points and narrative reckonings.
  • ⚡ Sets up serialized story arcs that build directly toward the climactic season finale.
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Season 15 Episodes

Episode Guide

🛡️ SPOILER SHIELD

Season 15 Progress Shield

Future titles & synopses blurred. Tap "Reveal" on any card to peek.
Binge Efficiency Engine

Season 15: Filler vs. Essential Canon

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

14%
86%
Mytharc (3): Crucial lore & season climaxes
Core (19): Character development & subplots
Side Quest (0): Standalone / filler
S15·E1 Mytharc

Life After Death

Sep 25, 2008 · 43 min

The 15th and final season of ER begins with the devastating repercussions of the ambulance explosion. As Morris and Neela do everything they can to save a wounded colleague, Abby t

S15·E2 Core

Another Thursday at County

Oct 9, 2008 · 43 min

Everyone in the ER is trying to cope with the loss of their colleague. The staff feels defensive toward the new Chief and her tough disposition. Gates and the new interns treat a b

S15·E3 Core

The Book of Abby

Oct 16, 2008 · 43 min

Abby's first day as an attending is bittersweet. Neela is hurt when she finds out Abby's news from someone else. Abby and the new ER Chief argue over how to treat a gunshot victim.

S15·E4 Core

Parental Guidance

Oct 23, 2008 · 43 min

Dr. Banfield defends herself during a mugging. Dubenko returns to work, due in no small part to Brenner's organized protests. A young gymnast comes into the ER with injuries consis

S15·E5 Core

Haunted

Oct 30, 2008 · 43 min

It's Halloween night, and the interns continue to be paired with the residents. Gates's teaching methods with Daria, and her responses, belittle Sam. A school fight results in a st

S15·E6 Core

Oh, Brother

Nov 6, 2008 · 43 min

Chaz, now a med student, begins his ER rotation. Morris takes him under his wing and shows him some risky procedures, endangering a patient and raising Banfield's ire. Neela become

S15·E7 Core

Heal Thyself

Nov 13, 2008 · 44 min

While out for a mind-clearing run, Banfield encounters a desperate situation and finds herself trying to rescue a young girl from drowning in a nearby lake. Painful memories of her

S15·E8 Core

Age of Innocence

Nov 20, 2008 · 43 min

Sam gets frustrated with Gates when he gets obsessed with finding a homeless war hero. Neela is upset at her intern after he gets the entire surgery department into a lawsuit. A hu

S15·E9 Core

Let it Snow

Dec 4, 2008 · 43 min

As a snowstorm hits Chicago, Sam's son Alex crashes a car and ends up in critical condition in the ER. Neela gives a deposition in the malpractice suit against her. Banfield and Mo

S15·E10 Core

The High Holiday

Dec 11, 2008 · 43 min

A package for Morris from his deceased father is delivered to the ER. Sam has some anxiety over Alex being removed from the ventilator. A woman with a high-risk pregnancy worries t

S15·E11 Core

Separation Anxiety

Jan 8, 2009 · 43 min

When a drug deal goes bad, two brothers sustain serious injuries and are brought to the ER. Tensions continue between Gates and Sam, coming to a head when Tony is the last to know

S15·E12 Core

Dream Runner

Jan 15, 2009 · 43 min

Neela has recurring dreams about trying to save a girl with sickle cell anemia. In them, she also goes to an attending interview and sees an old colleague, has conversations with R

S15·E13 Core

Love is a Battlefield

Jan 22, 2009 · 43 min

Morris faces a complicated case involving a young girl hit while riding her bicycle. Gates finds it very difficult to let go of his feelings for Sam. Neela becomes quite flustered

S15·E14 Core

A Long, Strange Trip

Feb 5, 2009 · 43 min

Gates and Morris tend to an elderly man who was assaulted on the street. Sam 's sister shows up unexpectedly. Brenner and Dubenko clash while treating a mother thought to have late

S15·E15 Core

The Family Man

Feb 12, 2009 · 43 min

A car accident in the ambulance bay injures a woman with a young child and leaves the mother in need of surgery with a significant recovery time. Brenner has difficulty finding a f

S15·E16 Core

The Beginning of the End

Feb 19, 2009 · 43 min

It's Valentine's Day. Dr. John Carter is back at the County. Brenner and Neela are getting closer. Dr. Banfield is having a hard time trying to have a baby. And Puck and mushrooms

S15·E17 Core

T-Minus-6

Feb 26, 2009 · 43 min

Carter finds himself struggling with County's new technology and procedures. After becoming frustrated with the in vitro-fertilization, Banfield and her husband discuss adoption as

S15·E18 Core

What We Do

Mar 5, 2009 · 43 min

A camera crew shooting footage for a documentary interviews members of the ER staff. Detective Claudia Diaz is brought in, critically injured with gunshot wounds. Neela laments the

S15·E19 Core

Old Times

Mar 12, 2009 · 43 min

Neela and Sam are shocked when they arrive back to the airport with transplant organs only to find that their plane has left them. Dr. Carter gets a surprise visit from an old frie

S15·E20 Core

Shifting Equilibrium

Mar 19, 2009 · 43 min

On Neela's last day at County, she has doubts as to whether she is making the right decision.

S15·E21 Mytharc

I Feel Good

Mar 26, 2009 · 43 min

The ER doctors and nurses help out at Camp Del Corazon, a camp for kids who have had open-heart surgery, working alongside the camp counselor.

S15·E22 Mytharc

And in the End...

Apr 2, 2009 · 84 min

As Carter prepares to open a new facility for the underprivileged, some old friends/colleagues gather. Rachel Greene, Mark Greene's daughter, applies for an internship at County.

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