en.Sketsamalang.com – SBS’s medical noir drama Doctor X: Mafia in White is set to intensify its central conflict in Episode 5, scheduled to air on Friday, October 23, 2026, at 9:50 p.m. KST. The upcoming episode brings freelance surgeon Gye Su-jeong, played by Kim Ji-won, into direct confrontation with Na Dae-il, portrayed by Jang Seung-jo, following the disturbing discovery of his past misconduct during surgery.
In Episode 4, Su-jeong discovered evidence that Na had carved his initials into a patient’s organ during an earlier operation. The revelation raised serious questions about his professional conduct and respect for medical ethics. According to SBS’s preview report published on October 22, Episode 5 will focus on Su-jeong’s efforts to stop Na and hold him accountable for his actions.
Sports Kyunghyang also reported that the confrontation would take center stage, quoting the production team as saying, “Kim Ji-won will confront Jang Seung-jo directly to stop his actions.”
Episode 5 Preview Shows a Tense Operating-Room Confrontation
New stills released ahead of the broadcast show Na during his earlier days as a military doctor. In one image, he appears to be operating alone, wearing an unsettling smile as he concentrates on the procedure. The scene offers a glimpse into the character’s disturbing relationship with surgery and the ethical concerns surrounding his actions.
Other stills show Su-jeong intervening in one of Na’s operations. She firmly grips his bloodstained hand and stares at him with visible anger and contempt, suggesting that she is determined to prevent further harm to the patient.
The images build anticipation over how Su-jeong will challenge a surgeon who appears respected by those around him despite the troubling evidence of his past behavior. They also raise questions about whether she can protect the affected patient and expose the full extent of Na’s misconduct.
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Doctor X Continues Its Ratings Momentum
The confrontation comes as Doctor X: Mafia in White continues to attract a substantial television audience in South Korea. According to Nielsen Korea figures reported by Seoul Economic Daily, the drama recorded nationwide ratings of 11.4% for Episode 1, 14.9% for Episode 2, 15.1% for Episode 3, and 18.5% for Episode 4. The series has therefore increased its nationwide rating with each of its first four episodes.
SBS has also reported that the drama reached a peak rating of 20.8% by Episode 4, highlighting the growing interest in its story of medical expertise, institutional conflict, and ethical accountability.
Episode 5 will continue exploring the consequences of Na’s actions and Su-jeong’s determination to protect patients. The broadcast is scheduled for Friday, October 23, at 9:50 p.m. KST on SBS. Viewers outside South Korea should check their local Netflix listings for streaming availability and release timing.
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