Chicago Med has spent more than a decade in the emergency department of Gaffney Chicago Medical Center, and the diagnosis has not changed since 2015. NBC’s medical drama, created by Dick Wolf as the third branch of his Chicago franchise, premiered on November 17, 2015, and has run 12 seasons and 220 episodes, with the last episode airing May 13, 2026. A twelfth season is set to premiere on October 7, 2026, after NBC renewed the series in March 2026. That is a long life for a show that has never been great. It is a reliable one.
- Premiere: November 17, 2015
- Last aired: May 13, 2026
- Seasons: 12
- Episodes: 220
- Renewed: March 2026
- Season 12 premiere: October 7, 2026
- Critical score: 5.2/10
- Metacritic: 52/100
Trailer, via TV Promo 360.
Gaffney Chicago Medical Center and the Wolf Machine
The premise is simple and it has stayed simple. Chicago Med follows the doctors and nurses of the emergency department at the fictional Gaffney Chicago Medical Center as they work to save lives and handle the personal and professional pressure of the job. The show sometimes crosses over with characters from Chicago Fire and Chicago P.D., which is how the franchise keeps its parts moving.
Dick Wolf built this as the third installment of the Chicago franchise, and the machinery shows. Cases are pulled from topical events. Relationships are forged fast and tested faster. The emergency room is treated as a place where everything happens at once, and the show rarely slows down to ask whether it should.
That approach has a cost. A medical drama can survive on pace, but pace is not the same thing as story. Chicago Med often mistakes volume for depth. The cases arrive, the doctors react, the personal lives collide, and the hour ends. Then it happens again.
Nick Gehlfuss and the First Cast
The original cast did the heavy lifting. Nick Gehlfuss played Dr. Will Halstead, a former plastic surgeon who becomes an ED supervising attending physician at the start of the series. He is from Chicago and is the older brother of Chicago P.D.’s Detective Jay Halstead. He was engaged to Dr. Natalie Manning in seasons three and four. He resigns at the end of the eighth season after sabotaging Jack Dayton’s OR 2.0 to prove its defects, then moves to Seattle to reunite with Natalie and her son. Gehlfuss returned as a guest in season 11.
Yaya DaCosta played April Sexton, a first-generation Brazilian-American ED senior nurse, across seasons 1 through 6, with a recurring turn in season 8. April has a younger brother, Noah, who started as a third-year medical student at the hospital, and she is a childhood friend of Chicago Fire’s Kelly Severide. In the sixth season she is accepted into a nurse practitioner program, and the seventh-season premiere, “You Can’t Always Trust What You See,” reveals she has started it. She returns in season 8 after finishing, rekindles her relationship with Dr. Ethan Choi, and marries him midseason with plans for a mobile clinic for the community’s impoverished patients.
Torrey DeVitto played Dr. Natalie Manning, an ED pediatrics fellow who becomes an attending in the emergency pediatrics division in the fifth season. She is a widow coping with the loss of her husband, Jeff, killed in action while serving in the U.S. military. In the first-season episode “Bound,” she gives birth to her son Owen.
These are real characters with real arcs, and the show gave them room. It also gave them melodrama. The balance tipped often.
Colin Donnell, Brian Tee and the Casting Churn
The casting history is its own story. The Walking Dead star Laurie Holden was originally cast as Dr. Hannah Tramble but dropped out for what were described as family reasons. On May 29, 2015, Arrow star Colin Donnell was cast as Dr. Connor Rhodes, the hospital’s newest trauma surgeon. In July 2015, Jurassic World star Brian Tee joined as Dr. Ethan Choi, an expert in infectious disease prevention and a Navy Reserve medical officer. On August 13, 2015, Pretty Little Liars star Torrey DeVitto was cast as Natalie Manning. On August 14, 2015, Jane the Virgin star Rachel DiPillo was cast as Sarah Reese, a fourth-year medical student.
Then the exits came. On April 19, 2019, NBC announced that original cast members Colin Donnell and Norma Kuhling would be written out at the end of the fourth season for creative reasons. On May 12, 2021, NBC announced that original cast members Yaya DaCosta and Torrey DeVitto would leave at the end of the sixth season after deciding not to renew their contracts to pursue new roles. On July 21, 2021, Steven Weber was promoted to series regular after recurring in the sixth season, and Guy Lockard and Kristen Hager joined the main cast. On October 12, 2022, NBC announced that Brian Tee would leave after eight seasons.
A show that loses this many original pieces is not rebuilding. It is replacing. Chicago Med has done that well enough to keep going, but the turnover shows in the relationships that never get to mature.
Steven Weber, Jessy Schram and the Current Team
The current cast is led by Steven Weber as Dr. Dean Archer, Jessy Schram as Dr. Hannah Asher, Luke Mitchell as Dr. Mitchell Ripley, Sarah Ramos as Dr. Caitlin Lenox, Darren Barnet as Dr. John Frost, S. Epatha Merkerson as Sharon Goodwin, and Oliver Platt as Dr. Daniel Charles. Merkerson and Platt are the spine of the show.
That continuity matters. The show’s best scenes tend to be the quiet ones between the medicine, and Merkerson and Platt are the reason those scenes land. The newer doctors are capable, but they are working with material that asks them to be fast rather than specific.
The synopsis calls Chicago Med an emotional thrill ride through the day-to-day chaos of the city’s most explosive hospital, with a courageous team of doctors who hold it together. That is accurate as a description and revealing as a limitation. “Explosive” is doing a lot of work there.
The Numbers Behind 220 Episodes
Here is the hard record.
| Milestone | Date |
|---|---|
| Series premiere | November 17, 2015 |
| Season 12 renewal announced | March 2026 |
| Last episode aired | May 13, 2026 |
| Season 12 premiere | October 7, 2026 |
NBC renewed the series for a twelfth season in March 2026. The network has not treated Chicago Med as a prestige project, and it has not treated it as disposable either. Twelve seasons is a statement. So is a 5.2 out of 10.
What the 5.2 Says
The published critical score for Chicago Med is 5.2/10, with a Metacritic score of 52/100. That is a fair number. It is not a pan. It is a shrug with a pen.
The show does the job. It fills an hour. It gives the Chicago franchise a third leg to stand on. It has produced 220 episodes, which is more than most shows will ever manage.
But a 5.2 is not an accident. Chicago Med has never solved its central problem: it treats the emergency room as a setting for plot rather than a place where character is revealed. The cases are topical. The relationships are fiery. The pandemonium is pulse-pounding. And after 220 episodes, it is hard to name a single one that changed how anyone thinks about medicine, or hospitals, or the people who work in them.
Chicago Fire and Chicago P.D. share this universe, and the crossovers are the clearest sign of how the franchise is built. What the source says is that the characters sometimes visit each other’s shows. That is a shared world, not a thesis.
What Actually Matters Here
The renewal is the real story. NBC ordering a twelfth season in March 2026, with a premiere set for October 7, 2026, tells you what the network thinks of Chicago Med. It thinks the show is dependable. It thinks the audience is there. It thinks the cost is worth it.
That is a legitimate verdict, and it is not the same as a critical one. A 5.2 out of 10 is the score of a show that is competent, familiar, and rarely surprising. It is the score of a show that people watch while doing something else. It is the score of a show that has been on so long that its own history has become its most interesting feature.
The exits are the part worth watching. Donnell and Kuhling out after season 4. DaCosta and DeVitto out after season 6. Tee out after season 8. Gehlfuss out after season 8, back for a guest turn in season 11. In this paper’s view, each departure thinned the bench, and the characters who left took their specific histories with them.
What remains is the format. Gaffney Chicago Medical Center. The emergency department. The doctors and nurses. The cases. The crossovers. The next season. It works. It has worked for 220 episodes. It will probably work for more.
That is the honest review of Chicago Med. It is not a bad show. It is a show that has chosen to be steady instead of good, and it has been rewarded for that choice with 12 seasons and counting. The 5.2 is not a punishment. It is a description.
Get the Notebook.
The day's best stories and every fresh verdict, in plain English, in your inbox by seven. One email a day, no more.