Some dramas have you hitting “next episode” before the credits finish, and Doctor X: Age of the White Mafia (닥터X: 하얀 마피아의 시대), streaming globally as Doctor X: Mafia in White, is one of them. It has also drawn a fair amount of controversy while it airs. Here is what works, what doesn’t, and whether it’s worth your weekends.
The Basics
SBS’s Friday-Saturday medical noir is written by Pyeon Seong-geun and directed by Lee Jung-rim. Lee is best known for earlier hits like VIP and Revenant, and the series blends medical drama with crime, noir, and mystery. It runs 12 episodes, airing Fridays and Saturdays on SBS from October 9. It is a remake of Japan’s Doctor-X: Surgeon Daimon Michiko, though it is hardly a copy. The Japanese original put its heroine’s name in the subtitle, while the Korean version names her opponent instead: the medical establishment in white coats.
That change of subtitle tells you what the show is about. It is less a story about one brilliant surgeon than about the system she refuses to bow to.
The Premise
Kim Ji-won stars alongside Lee Jung-eun, Son Hyun-joo, and Kim Woo-seok. Kim plays Gye Su-jeong, a genius surgeon who, in the words of the show’s marketing, proves what it truly means to be a doctor solely through skill. Her nickname tells you the tone: “Crazy Gye of the Operating Room.” She is a freelance-style outsider who walks into hospital hierarchies built on seniority, politics, and money, and quietly dismantles them with her hands.
If you’ve watched the Japanese version or any “lone genius vs. the institution” story, you know the shape. The fun is in the execution, and the show has plenty of that.
Kim Ji-won: The Reason to Watch
Kim Ji-won’s casting is the show’s biggest strength. The role marks her hotly anticipated comeback after Queen of Tears, and it could hardly be further from that romance. Her Gye Su-jeong is cold, abrasive, and unapologetic. Kim plays her with minimal fuss, letting competence carry the charisma. One review summed up the performance as dialing down the flash and filling it with grit.
The character’s catchphrase, a flat “I do not fail,” is the kind of line that could be cheesy. The show earns it by making her competence feel physical rather than merely announced. Su-jeong is a delight when she shuts a room up with a single decision, and Kim never plays her as a saint. She’s prickly, and the show lets her be.
The Supporting Cast and Villains
A noir needs antagonists worth hating, and the series delivers.
- Jang Seung-jo plays surgeon Na Dae-il. His creepy true nature is revealed in episode 4, a villain twist credited with driving ratings to 18.5%. It is a strong turn, and the slow reveal of what he really is reframes earlier scenes nicely.
- Jung Seok-yong appears as Kim Chang-su, a heavyweight of the medical community who builds tension with Kim Ji-won’s character. He is the “white mafia” in human form: polite, powerful, and untouchable.
- Lee Jung-eun and Son Hyun-joo, both veterans, give the show gravity. Their scenes are the strongest argument that this is a drama about institutions rather than just a one-woman showcase.
The ensemble also pays off the “universe” angle. SBS has positioned the show as an expansion of its Taxi Driver and Agent Kim Reactivated justice universe. If you like that brand of cathartic revenge storytelling, you already know the rhythm: wrongdoers rise, then fall, satisfyingly.
What Works
1. Pacing. Episodes move briskly, pairing an operating-room crisis with a larger political thread. The structure is addictive. A patient-of-the-week stakes you in the moment, while the bigger conspiracy keeps you from stopping.
2. Catharsis. The show understands the pleasure of watching a corrupt person get what’s coming. SBS itself describes it as part of the “gratifying justice” tradition, and the label fits.
3. The theme of the title. Calling the medical elite a “mafia” gives the story a sharper point of view than the usual hospital-romance formula. You get a medical drama with an actual argument: that prestige and loyalty can matter more than patients.
4. Visual tone. The noir lighting and cold hospital palette fit the material. It looks like a thriller that happens to take place in an OR.
What Doesn’t
Medical accuracy. This is the most persistent complaint. Viewers were already complaining after the first two episodes about flimsy medical accuracy in some scenes. The criticism has not gone away: a Korea Herald report links the show’s viewership dip to lingering controversy over medical accuracy and its portrayal of history. If you’re a medical professional, or someone who can’t ignore a scene that gets a procedure wrong, this may grate. For a show built on the credibility of its heroine’s skill, that criticism stings more than it would for a lighter drama.
Formula. The “genius outsider humiliates the establishment” structure is familiar, and a few beats are predictable. The show compensates with performance and pacing, but if you’re tired of the template, it won’t reinvent it.
The controversy cloud. Real-world noise has followed the series. A petition tied to the show’s handling of the 5·18 historical event was in the news in late October. I won’t weigh in on the specifics here, since the details are best read in the original Korean coverage, but it is part of the conversation around the drama, and viewers should know about it.
The Numbers
The ratings story is a big part of why this drama matters right now.
- The premiere recorded 11.4% nationwide, the top premiere rating among all 2026 miniseries.
- Episode 2 reached 14.9%.
- Episode 4 hit 18.5% nationwide with a peak of 20.8%.
- Episode 6 reached 19.5%, and the show also took the top spot on Netflix’s non-English Top 10.
- Then the dip: episode 8, aired October 31, recorded 15.6% nationwide, as controversy weighed on the run.
A Gallup Korea survey from October 20–22 also ranked it No. 1 among the programs Koreans enjoy watching most. A dip from the peak doesn’t make it a failure; these are still big numbers by modern standards.
The Verdict
Doctor X: Age of the White Mafia is a propulsive, star-driven medical noir. Kim Ji-won is the anchor, Jang Seung-jo gives it a memorable villain, and the writing knows exactly when to deliver the payoff you’ve been waiting for. Its weaknesses are real, especially the medical-accuracy complaints and a familiar formula, and the off-screen controversy deserves your attention too.
Watch it if you like: Taxi Driver-style revenge dramas, antiheroine leads, and noir-tinged hospital stories with a social point.
Skip it if you want: a realistic procedural, a gentle romance, or a medical drama with no interest in power struggles.
