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Season guide

Chicago Med: Season 4

22 episodes Premiered Sep 26, 2018 Updated Sep 20, 2026

Chicago Med Season 4 continues the overarching saga across twenty-two episodes. The season serves as an emotional thrill ride through the day-to-day chaos of the city's most explosive hospital and the courageous team of medical professionals who work within it. The narrative follows the staff as they navigate high-pressure medical emergencies, personal challenges, and professional dilemmas within the demanding enviro

Previously on Chicago Med

Season 4 Lore Primer

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

  • The series takes place within the day-to-day chaos of the city's most explosive hospital.
  • A courageous team of medical professionals staffs the facility to handle high-pressure emergencies.
  • The overarching narrative follows the complex medical cases and professional lives of the hospital staff.
  • The medical personnel face ongoing challenges while working within a demanding and emotional environment.

Season overview

Chicago Med Season 4 continues the overarching saga across twenty-two episodes. The season serves as an emotional thrill ride through the day-to-day chaos of the city's most explosive hospital and the courageous team of medical professionals who work within it. The narrative follows the staff as they navigate high-pressure medical emergencies, personal challenges, and professional dilemmas within the demanding environment of the hospital setting. Throughout the twenty-two episodes of this fourth season, the ensemble cast faces complex patient cases that test their skills, ethics, and emotional resilience. The daily operations of the emergency department remain a focal point, capturing the intense pace and dramatic interactions that define the medical staff's experiences at the facility.

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Season 4 Episodes

Episode Guide

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Season 4: 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
S4·E1 Mytharc

Be My Better Half

Sep 26, 2018

Bekker takes drastic action to keep Rhodes from leaving Med for good. Meanwhile, Halstead questions Manning's feelings about their upcoming wedding, Ethan receives shocking news ab

S4·E2 Core

When to Let Go (II)

Oct 3, 2018

The doctors and nurses of Chicago Med find themselves on high alert when an overflow of patients are rushed into the doors following a terrifying apartment complex blaze. Dr. Rhode

S4·E3 Core

Heavy Is the Head

Oct 10, 2018

When a sick boy is brought in, Ethan is faced with a tough decision that quickly escalates into a complicated and dangerous situation. Connor and Maggie are put to the test, while

S4·E4 Core

Backed Against the Wall

Oct 17, 2018

Dr. Halstead gets an unplanned visit from the CPD while Ethan is skeptical of a woman who is experiencing chronic pain. Natalie tends to a cancer patient whose brother has strong f

S4·E5 Core

What You Don't Know

Oct 24, 2018

When things become complicated, Will is forced to lie to Natalie. Ethan and April find out some compromising information about Emily's boyfriend and Ava is unsure of what to do wit

S4·E6 Core

Lesser of Two Evils

Oct 31, 2018

Dr. Manning and Dr. Halstead become skeptical of a patient's injuries when the victim of a car accident is brought into the hospital. Ethan and April have a difficult time understa

S4·E7 Core

The Poison Inside Us

Nov 7, 2018

The hospital is forced to evacuate when a toxic chemical is brought into the E.D., leaving patients and the staff in grave danger. Stuck in an elevator, Dr. Charles and Dr. Manning

S4·E8 Core

Play By My Rules

Nov 14, 2018

Dr. Charles struggles to convince Dr. Choi that surgery isn't always the answer. Dr. Rhodes finds himself in hot water with Goodwin when he disobeys her direct order. April becomes

S4·E9 Core

Death Do Us Part

Dec 5, 2018

Will and Natalie prepare for their big day, but an unsuspecting Will soon finds himself sidetracked. Dr. Charles disagrees with Goodwin on how to best handle a patient's treatment

S4·E10 Core

All the Lonely People

Jan 9, 2019

April finds herself in a dangerous situation and Natalie gets an update on Will. Dr. Rhodes gears up for a gala honoring his hybrid O.R. and tries to convince Dr. Bekker to join hi

S4·E11 Core

Who Can You Trust

Jan 16, 2019

Halstead takes heat for making an unauthorized move to treat his pregnant patient. Choi becomes personally invested when treating a homeless veteran. Rhodes and Bekker deal with a

S4·E12 Core

The Things We Do

Jan 23, 2019

Dr. Halstead rushes to rescue Dr. Manning after she is involved in a Medevac helicopter crash. The personal drama between Dr. Rhodes and Dr. Bekker boils over. Dr. Charles and Dr.

S4·E13 Core

Ghosts in the Attic

Feb 6, 2019

Halstead hides the theft of his gun from a suspicious Manning. Tensions are still high between Connor and Bekker, who take a risk operating on an HIV-positive patient. Hank breaks

S4·E14 Core

Can't Unring That Bell

Feb 13, 2019

Connor, who is in hot water with the hospital's Oversight Committee, handles a gunshot victim with unexpected ties to Halstead. Maggie feels guilty about the return of a former pat

S4·E15 Core

We Hold These Truths

Feb 20, 2019

Natalie and Maggie witness a pickup truck plow through a street fair and must make tough decisions on the fly. At the hospital, doctors and nurses are on high alert with the influx

S4·E16 Core

Old Flames, New Sparks

Feb 27, 2019

Halstead treats a woman on the verge of freezing to death. Dr. Charles' ex-wife receives some concerning news. Choi handles a lymphoma patient with viral meningitis and a complicat

S4·E17 Core

The Space Between Us

Mar 27, 2019

When a car unexpectedly smashes through the ambulance bay doors, Dr. Choi makes some difficult decisions in an effort to save a worker trapped beneath the wreckage and April, who's

S4·E18 Core

Tell Me the Truth

Apr 3, 2019

Dr. Rhodes receives an alarming phone call that prompts him to rush out in the middle of an important surgery. Dr. Halstead comes to the aid of an FBI agent who is brought into the

S4·E19 Core

Never Let You Go

Apr 24, 2019

The hospital goes into lockdown mode when a man with a gun holds medical staff hostage. Goodwin is forced to make a tough decision. Dr. Rhodes begins to realize his time with his f

S4·E20 Core

More Harm Than Good

May 8, 2019

Dr. Charles and Dr. Manning disagree on how to handle a patient who they discover is poisoning herself. Dr. Rhodes throws some serious accusations at Dr. Bekker. Dr. Halstead has s

S4·E21 Mytharc

Forever Hold Your Peace

May 15, 2019

Caroline has news to share, forcing Dr. Charles to make a serious decision about their relationship. Maggie meets her sister's new boyfriend, but discovers danger may lie ahead. Dr

S4·E22 Mytharc

With a Brave Heart

May 22, 2019

Dr. Charles and Caroline set some major plans. Ava fights to keep her relationship with Connor. Agent Lee informs Will of news that may put his life in danger.