Netflix's Next Big Medical Drama Has a Stacked Reason to Watch

Director Hong Jong-chan's Chamgyoyuk (True Education) has been sitting at number one on Netflix's non-English show chart for three consecutive weeks — 19 countries at the top, top 10 in 85 countries — and before that wave has even crested, his next project just got confirmed. The new Netflix original series First Doctor is a pediatric surgery drama, and the cast announcement dropped on the 23rd alongside official production confirmation.

The premise centers on Heo Ji-wan, a pediatric surgery professor who is widely respected for her skill but notorious inside the hospital for being a straight-talking troublemaker. An unexpected accident forces her back to Yeonhwa University Hospital, where the pediatric surgery department is on the verge of being shut down entirely. Jung Ryeo-won takes the role — and this marks her return to a doctor character roughly 13 years after Medical Top Team in 2013. Her range across legal and procedural dramas (Witch at Court, Closing Argument) has been well-documented, so watching her pivot back to a white coat with this kind of material behind her is genuinely exciting.

Opposite her is Ha Yoon-kyung as Ki Eun-gyeol, a third-year resident at Yeonhwa Hospital — sharp, fast-handed, and the kind of junior who has been on the chief of surgery's radar since her first year. The dynamic between her and Heo Ji-wan is set up as a mentor-mentee tension that sounds less warm-and-fuzzy and more friction-heavy, which honestly suits this director's style perfectly.

The veteran layer of the cast is where First Doctor really starts to feel like a serious production. Baek Hyun-jin plays the chief of surgery Son Sang-baek, and Kim Jong-soo — who has built a reputation for carrying quiet, weighty authority in every role — plays the hospital's vice president Lee Chang-gon. These two aren't decorative casting; in a Hong Jong-chan drama, the institutional figures are usually where the systemic critique lives.

Then there's Kim Moo-yeol, playing anesthesiology professor Bae Su-wol, a warm and easygoing colleague with a long history with Heo Ji-wan. His casting is the one that signals the most about the production's confidence level. This will be his third collaboration with Hong Jong-chan — they first worked together on Juvenile Justice (2022), reunited for Chamgyoyuk this year, and now First Doctor makes it a trilogy. Kim Moo-yeol has publicly said his reason for joining Chamgyoyuk was his trust in the director, and that kind of repeat collaboration in Korean drama is rare enough to mean something.

The writer is also a reunion: Kim Min-seok, who wrote Juvenile Justice and won the screenplay award at the 58th Baeksang Arts Awards for it, is back with Hong Jong-chan for First Doctor. Juvenile Justice was his debut script. The fact that his second major work is with the same director, on a subject — the crisis in essential medical care — that carries the same social-systems weight as juvenile crime, suggests this isn't going to be a conventional hospital romance.

The Chamgyoyuk effect is already doing something interesting in the data: Juvenile Justice, which came out in 2022, re-entered the Netflix non-English top 10 this week with views of 1.2 million, landing in 16 countries. That kind of catalog revival is what happens when a director becomes a brand rather than just a name in the credits. The Hong Jong-chan–Kim Moo-yeol axis is clearly landing with global audiences in a way that makes First Doctor feel less like a bet and more like a continuation of something already working.

No air date has been announced yet, but with production confirmed and the full lead cast public, this one is worth putting on your radar now. If Juvenile Justice and Chamgyoyuk are the template — tightly written, socially grounded, with characters who are genuinely complicated rather than just likable — First Doctor has every structural reason to follow.