Kim Ji Won’s return to television came with the biggest premiere of any 2026 miniseries. SBS’s Doctor X averaged 11.4% nationwide for episode 1 on October 9, according to Nielsen Korea, then rose to 14.9% for episode 2, the most-watched program of Saturday night.
Key Takeaways
- Episode 1 (October 9): 11.4% nationwide and 11.2% in the capital region, the highest premiere of any 2026 miniseries, per Soompi and Sports Kyunghyang.
- Episode 2 (October 10): 14.9% nationwide and 14.7% in the capital region, peaking at 17.4%, per Sports Kyunghyang.
- Kim Ji Won plays Gye Soo Jung, a gifted surgeon who takes on a corrupt hospital through skill alone. The series is based on a Japanese drama.
- The 12-episode series airs Fridays and Saturdays on SBS and is listed by What’s on Netflix as streaming globally outside South Korea.
How the Ratings Compare
| Episode | Air date | Nationwide | Capital region | Note |
|---|---|---|---|---|
| 1 | October 9 | 11.4% | 11.2% | Highest premiere of any 2026 miniseries |
| 2 | October 10 | 14.9% | 14.7% | Peak of 17.4%; most-watched program that Saturday |
Episode 2 added 3.5 percentage points over the premiere, based on the two reported nationwide figures. In Soompi’s October 11 ratings roundup, KBS 2TV’s Love on the Menu came second on the same Saturday at 14.7%, a gap of 0.2 points. That roundup did not name a separate source for the competing figures.
What Is Doctor X About?
Gye Soo Jung, nicknamed the “mad Gye of the operating room,” is dispatched to Guseo University Hospital as a freelance doctor. There she takes on the corruption and the power cartel running the institution. Sports Kyunghyang describes the drama as a medical noir and notes that it is Kim Ji Won’s return two years after Queen of Tears.
Cast
| Actor | Role |
|---|---|
| Kim Ji Won | Gye Soo Jung, a gifted freelance surgeon |
| Lee Jung Eun | Jang Hee-suk, head of a doctor temp agency |
| Kim Woo Seok | Park Tae-gyeong, an intern |
| Kim Young-min | Do Yoon-sik |
| Lee Sung-wook | Bae Heung-gon |
| Son Hyun Joo, Kang Hak Soo | Roles not listed in the sources we reviewed |
Air Times for International Viewers
New episodes air on Fridays and Saturdays at 9:50 p.m. KST on SBS. Netflix release timing outside Korea may differ, so check your local listing.
| Region | Local broadcast time |
|---|---|
| Philippines, Malaysia, Singapore | 8:50 p.m. |
| Thailand, Vietnam, western Indonesia | 7:50 p.m. |
| Colombia, Peru | 7:50 a.m. |
| Mexico City | 6:50 a.m. |
| Brazil, Argentina | 9:50 a.m. |
| United States (Eastern) | 8:50 a.m. |
| United States (Pacific) | 5:50 a.m. |
Editor’s Take
Two numbers explain why this launch drew attention: an 11.4% premiere that set a 2026 miniseries record, and a 3.5-point jump the next night. Rising between episode 1 and episode 2 is a better sign for a weekly drama than a strong opener that fades, though two episodes are not enough to predict the run.
Sports Kyunghyang’s review credits Kim Ji Won’s restrained, deadpan performance for giving the medical noir its weight and its occasional comic beats. That is one critic’s view, but it matches the show’s pitch: a lead character who proves her worth through skill rather than speeches.
The series also illustrates how Korean networks adapt foreign formats. Doctor X is based on a Japanese drama, and the early ratings suggest the Korean version is finding its own audience on Friday and Saturday nights. We did not find verified fan-reaction data yet, so we have not included any.
Sources
- Soompi · 2026-10-10
- Soompi · 2026-10-11
- Sports Kyunghyang · 2026-10-11
- What’s on Netflix · 2026-09-29