Kim Ji Won is making a remarkable return to television with her latest drama, “Doctor X: Age of the White Mafia.”
The medical noir series premiered on October 9, 2026, and immediately attracted strong viewership, earning the highest premiere ratings among miniseries released in 2026 so far.
According to Nielsen Korea, the first episode recorded an average nationwide rating of 11.4 percent, giving the SBS drama an impressive start.
The achievement is particularly noteworthy because the series entered the ratings race with double-digit viewership from its very first episode.
Kim Ji Won’s return to the small screen has drawn considerable attention, especially following the success of her previous hit drama, “Queen of Tears.”
With an intense medical setting and a protagonist determined to challenge corruption, “Doctor X” has established itself as one of the most promising new Korean dramas of the year.
Kim Ji Won’s Genius Surgeon Challenges a Corrupt Hospital System
In “Doctor X,” Kim Ji Won plays Gye Soo Jung, a highly skilled surgeon who believes that medical expertise should matter more than institutional power or personal connections.
Nicknamed the “mad dog of the operating room,” her character refuses to compromise her principles, even when confronted by powerful figures within the medical establishment.
The drama follows Gye Soo Jung as she takes on corruption and entrenched hierarchies at Guseo University Hospital.
Rather than accepting the rules imposed by influential people, she relies on her exceptional surgical abilities to challenge a system in which money, authority, and personal interests can overshadow patient care.
Based on the popular Japanese drama series “Doctor X,” the Korean adaptation combines medical emergencies with a broader story about justice and accountability.
Its medical noir approach distinguishes it from conventional hospital dramas, placing as much emphasis on institutional wrongdoing as on the challenges of saving patients.
The premiere reportedly reached a peak nationwide rating of 12.9 percent, while its average rating in the Seoul metropolitan area stood at 11.2 percent.
These figures further underline the strong response to the series’ opening episode.
Lee Jung Eun and the Supporting Cast Add Depth to the Medical Noir
Alongside Kim Ji Won, “Doctor X” features a notable supporting cast that helps bring the drama’s complex hospital environment to life.
Lee Jung Eun plays Jang Hee Suk, the head of a physician staffing agency who becomes connected to Gye Soo Jung’s professional journey.
Their relationship is an important element of the story, bringing together two women whose experiences and ambitions shape their partnership.
Son Hyun Joo appears as Boo Seung Gwon, a powerful hospital executive, while Kim Woo Seok plays Park Tae Kyung, a surgical intern whose position within the institution offers another perspective on its complicated hierarchy.
The characters introduce different motivations and conflicts, adding layers to the central struggle between medical skill and institutional influence.
The strong premiere ratings give “Doctor X” considerable momentum as its story continues.
However, its long-term performance will depend on whether the drama can maintain audience interest through its upcoming episodes.
For Kim Ji Won, the series offers an opportunity to explore a character markedly different from her previous romantic-drama roles.
With its uncompromising heroine, high-stakes medical cases, and criticism of corruption, “Doctor X” has begun its run on an encouraging note.
As viewers wait to see how Gye Soo Jung’s battle against the hospital establishment unfolds, the drama’s impressive opening has already made it one of the standout miniseries premieres of 2026.
