Kim Ji-won is back on television after a two-year break, and her return is already breaking records. The SBS medical noir Doctor X: Mafia in White premiered on October 9, introducing viewers to Gye Su-jeong, a freelance surgeon who refuses to play by the hospital’s rules. The first two episodes have set a new benchmark for 2026 K-drama premieres, with ratings climbing faster than anyone expected.
What Is Doctor X Mafia in White About
Doctor X: Mafia in White is a Korean remake of the hit Japanese drama Doctor X, which ran for seven seasons and became a household name in Japan. The Korean version is set in the post-COVID era, where new regulations have led to a wave of doctor resignations across South Korea. Guseo University Hospital, facing a severe staffing shortage, contacts a medical staffing agency to hire a temporary “mercenary doctor” — Gye Su-jeong (Kim Ji-won).
Su-jeong is a genius surgeon with unmatched skills, known as the “crazy Gye of the operating room.” She does not attend hospital dinners, does not do overtime, and leaves work at exactly 6 PM every day. She responds to unreasonable demands with a simple “I will not do that.” Her only loyalty is to her patients.
The drama is directed by Lee Jung-rim and written by Pyeon Seong-geun. It airs every Friday and Saturday at 9:50 PM KST on SBS and streams globally on Netflix the same day.
Gye Su-jeong Makes Her Mark in Episode 1
The premiere episode opens with a flashback to a fire at a medical facility, where a young Gye Su-jeong holds a child’s hand amid the flames. This memory haunts her throughout the episode, hinting at past trauma that drives her relentless dedication to saving lives.
On her first day at Guseo University Hospital, Su-jeong attends a surgical conference and immediately objects to the director’s recommended open surgery method. She points out that laparoscopic surgery would be safer for the patient but is being ignored because the doctors want to please their boss. The director, Kim Myeong-seop (played by Kim Jong-gu), is furious and has her removed from the room.
Su-jeong does not back down. She confronts the surgical department directly, calling out doctors who pursue medicine for power and personal gain rather than patient care. Despite the heated argument, she clocks out at exactly 6 PM, grabs her backpack, and leaves.
The turning point comes during a surgery when Director Kim suffers a stroke mid-operation. Half the staff rushes to treat him, neglecting the patient on the table. Su-jeong steps in without permission, stabilizes the director, and then rushes into the operating room to save the patient’s life.
Bu Seung-kwon (Son Hyun-joo) silently watches everything. He uses evidence against Director Kim to take over as the new hospital director and personally invites Su-jeong back to work. However, he crumples her resume and says, “It’s just a tail that can be cut off,” hinting that he sees her as a tool rather than a partner.
Episode 2 Tests Su-jeong With a VIP Patient
The second episode revolves around two pancreatic cancer patients: a wealthy chairman and a teenage girl. When the chairman arrives by wheelchair, Su-jeong pushes him aside and puts the girl in the chair instead. She does not care about VIP status — she only cares about who needs help most.
The chairman demands an apology, but Su-jeong refuses. In the conference room, she objects to his treatment plan, and the hospital ends up running two surgeries at the same time in separate operating rooms. During the chairman’s surgery, the assigned doctor freezes after realizing how dangerous the condition is and decides to close him up. The director then calls Su-jeong to take over.
Su-jeong successfully saves the VIP patient, but the episode ends with her worried about the patient she just saved, leaving viewers with a cliffhanger.
Ratings Soar From the First Episode
The premiere episode recorded a nationwide viewership rating of 11.4%, with a peak of 12.9%. It became the highest-rated premiere of any miniseries in 2026, surpassing other major releases.
The second episode, which aired on October 10, climbed to an average nationwide rating of 14.9% and a peak of 17.4%. It was the most-watched program of Saturday overall.
This is a significant achievement for a Friday-Saturday drama on SBS and marks Kim Ji-won’s strongest premiere since her previous hit, Queen of Tears. The ratings growth from episode one to episode two suggests strong word-of-mouth and viewer engagement.
Kim Ji-won Transforms Into a Different Kind of Hero
Kim Ji-won shared at a press conference in Seoul that she deliberately stripped away the glamorous styling from her previous role to become Gye Su-jeong. “I changed my hairstyle to a bob to portray Gye Soo-jung. My previous project, ‘Queen of Tears,’ featured very glamorous fashion, so this time, I approached the character by trying to strip things down as much as possible,” she said.
She also spoke about the pressure of leading a medical drama, a genre typically dominated by male actors. “I took courage thinking, ‘When will I ever get to play such an attractive title role again?’ I prepared diligently with the thought that it would be the greatest honor if I could leave behind one great medical project in my acting career,” Kim said.
Director Lee Jung-rim explained how the Korean adaptation differs from the Japanese original. “The backgrounds and systems are quite different, so we reinterpreted the story by keeping its basic framework and appealing elements while trying to bring out a distinctly Korean sensibility,” she said. “What makes this series different is that we added noir to those elements.”
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Who Else Stars in Doctor X Mafia in White
Son Hyun-joo plays Bu Seung-kwon, the new hospital director with a hidden agenda. He is one of the few people who rejects the Magnolia Doctors’ Association, a powerful group within the hospital. He recognizes Su-jeong’s abilities but seems to want to use her for his own purposes.
Lee Jung-eun plays Jang Hee-sook, Su-jeong’s boss at the medical staffing agency. She is a sharp negotiator who tears up the contract Bu Seung-kwon offers and lays down her own conditions and price list for hiring Su-jeong.
Kim Woo-seok plays Park Tae-kyung, a young intern who first meets Su-jeong during a medical emergency at a pool hall. He witnesses her unconventional methods and becomes entangled in her world at the hospital. His character adds a layer of tension as he often misunderstands Su-jeong’s actions, believing she is abandoning patients when she is actually working to save them in her own way.
Where to Watch Doctor X Mafia in White
Doctor X: Mafia in White airs every Friday and Saturday at 9:50 PM KST on SBS in South Korea. For global audiences, the drama streams on Netflix the same day it airs in Korea, with subtitles available in multiple languages including English, Spanish, and Portuguese.
The series consists of 12 episodes and is scheduled to run from October 9 to November 2026. New episodes drop weekly, with the final episode expected in late November.
Viewers in the United States, United Kingdom, Canada, Australia, India, and other regions can watch the show on Netflix with a standard subscription. The drama is also available on Wavve and TVING in South Korea for those who prefer local streaming platforms.
For more K-drama recaps, cast updates, and streaming guides, stay tuned to VvipTimes — where every story gets the spotlight it deserves.
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