One Chicago & The FBIs Wiki
Chicago Med (Season 4)
Episodes: 22
Network: NBC
Original run: September 26, 2018 - May 22, 2019
Season chronology
Previous season: Season 3
Next season: Season 5
One City. One Family. One Night.

–Chicago Med Season 4 tagline

Chicago Med season 4 premiered on September 26, 2018 and concluded on May 22, 2019 on NBC.

Dr. Will Halstead (Nick Gehlfuss) has to balance the stress as the ER’s supervising Attending Physician with his relationship with Dr. Natalie Manning (Torrey DeVitto), emergency pediatrics resident. Rising star heart surgeon Dr. Connor Rhodes (Colin Donnell) tackles a new and exciting challenge in the hospital that keeps him in close proximity to his former rival and highly competitive Cardiothoracic Fellow, Dr. Ava Bekker (Norma Kuhling). Dr. Daniel Charles (Oliver Platt) remains the Sherlock Holmes of psychiatry. Former Navy flight surgeon Dr. Ethan Choi (Brian Tee) brings his battlefield skills to the front lines of Chicago’s busiest ER, the go-to place for victim’s of the city’s gun violence. Sharon Goodwin (S. Epatha Merkerson), the venerable head of the city’s largest hospital, is under intense fiscal scrutiny to preserve the bottom line while continuing to ensure that all patients receive nothing short of quality care and compassion. To further complicate matters, she now finds herself having to answer to the newly hired C.O.O., Gwen Garrett (guest star Heather Headley).

April Sexton (Yaya DaCosta) is a smart, bold and intuitive ER nurse who is newly single, having broken off her romantic relationship with Ethan. Maggie Lockwood (Marlyne Barrett) is the confident charge nurse and the eyes, ears and brain of the emergency department. Lending his skills in the ER is April’s ambitious brother, Dr. Noah Sexton (guest star Roland Buck III).

Together, they will confront Chicago’s most critical medical cases and challenging ethical dilemmas with courage, compassion and state-of-the-art treatment. "Chicago Med" will weave cutting-edge medicine with the personal drama that comes with working in such a high-intensity environment. Through it all, familiar faces from "Chicago Fire," and "Chicago P.D" will intertwine with Chicago’s finest medical heroes.


Main Cast and Characters

Crossover Guest Stars

Recurring Guest Stars

Recurring Co-Stars


Image Episode Summary Airdate
Cm0401.jpg 4.01 (#62)
Be My Better Half
Goodwin finds herself quickly clashing with the new hospital COO Gwen Garrett while April questions whether or not Ethan's sister, Emily, is using again. September 26, 2018
Cm0402.jpg 4.02 (#63)
When to Let Go
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. October 3, 2018
Cm0403.jpg 4.03 (#64)
Heavy is the Head
When a sick boy is brought in, Ethan is faced with a tough decision that quickly escalates into a complicated and dangerous situation. October 10, 2018
Cm0404.jpg 4.04 (#65)
Backed Against the Wall
Dr. Halstead gets an unplanned visit from the CPD while Ethan is skeptical of a woman who is experiencing chronic pain. October 17, 2018
Cm0405.jpg 4.05 (#66)
What You Don't Know
When things become complicated, Will is forced to lie to Natalie. October 24, 2018
Cm0406.jpg 4.06 (#67)
Lesser of Two Evils
Dr. Manning and Dr. Halstead become skeptical of a patient's injuries when the victim of a car accident is brought into the hospital. October 31, 2018
Cm0407.jpg 4.07 (#68)
The Poison Inside Us
The hospital is forced to evacuate when a toxic chemical is brought into the E.D., leaving patients and the staff in grave danger. November 7, 2018
Cm0408.jpg 4.08 (#69)
Play by My Rules
Dr. Charles struggles to convince Dr. Choi that surgery isn't always the answer. November 14, 2018
Cm0409.jpg 4.09 (#70)
Death Do Us Part
Will and Natalie prepare for their big day, but an unsuspecting Will soon finds himself sidetracked. December 5, 2018
Cm0410.jpg 4.10 (#71)
All the Lonely People
April finds herself in a dangerous situation and Natalie gets an update on Will. January 9, 2019
Cm0411.jpg 4.11 (#72)
Who Can You Trust
Will adjusts to hospital life in the aftermath of his recent undercover activities. January 16, 2019
Cm0412.jpg 4.12 (#73)
The Things We Do
Dr. Halstead rushes to rescue Dr. Manning after she is involved in a Medevac helicopter crash. January 23, 2019
Cm0413.jpg 4.13 (#74)
Ghosts in the Attic
Dr. Halstead withholds some important information from Dr. Manning and she begins to question his suspect behavior. February 6, 2019
Cm0414.jpg 4.14 (#75)
Can't Unring That Bell
Will's personal issues continue to interfere with his relationship with Natalie and his life at the hospital. February 13, 2019
Cm0415.jpg 4.15 (#76)
We Hold These Truths
After witnessing a pick-up truck plow through a street fair, Natalie and Maggie are forced to make some tough decisions on the fly. February 20, 2019
Cm0416.jpg 4.16 (#77)
Old Flames, New Sparks
Natalie and Will grow further apart. Dr. Charles struggles to come to terms with his feelings toward his ex-wife. February 27, 2019
Cm0417.jpg 4.17 (#78)
The Space Between Us
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 also in danger. March 27, 2019
Cm0418.jpg 4.18 (#79)
Tell Me the Truth
Dr. Rhodes receives an alarming phone call that prompts him to rush out in the middle of an important surgery. April 3, 2019
Cm0419.jpg 4.19 (#80)
Never Let You Go
The hospital goes into lockdown mode when a man with a gun holds medical staff hostage. April 24, 2019
Cm0420.jpg 4.20 (#81)
More Harm Than Good
Dr. Charles and Dr. Manning disagree on how to handle a patient who they discover is poisoning herself. May 8, 2019
Cm0421.jpg 4.21 (#82)
Forever Hold Your Peace
Caroline has news to share, forcing Dr. Charles to make a serious decision about their relationship. May 15, 2019
Cm0422.jpg 4.22 (#83)
With a Brave Heart
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. May 22, 2019

Chicago Med
Seasons Season 1Season 2Season 3Season 4Season 5Season 6Season 7Season 8
Current characters Will HalsteadEthan ChoiCrockett MarcelMaggie LockwoodDylan ScottHannah AsherSharon GoodwinDaniel CharlesDean Archer
Former characters Sarah ReeseConnor RhodesAva BekkerApril SextonNatalie ManningStevie Hammer