The Trauma Code: Heroes on Call is officially getting two more seasons, and the trauma team’s central trio will include one new face. Netflix confirmed on Oct. 19 that it will produce Seasons 2 and 3 of the hit Korean medical drama at the same time, with Lovelyz member-turned-actor Jung Ye-in joining as veteran nurse Cheon Jang-mi.
The casting settles the biggest question left hanging after Season 1: who would work alongside surgeon Baek Kang-hyuk and his protege Yang Jae-won. For anyone searching for the new The Trauma Code season 2 cast list, nearly everyone else is staying put, which makes this a recast rather than a reset.
The Trauma Code Season 2 Cast: What Netflix Confirmed
The renewal came straight from Netflix and marks the first time the streamer has put the two-season order and the updated lineup on the record together. Both seasons will be produced simultaneously, a step that can shorten the usual wait between installments.
Ju Ji-hoon is back as Baek Kang-hyuk, the battlefield-trained surgeon at the center of the story, and Choo Young-woo returns as Yang Jae-won. Jung will play Cheon Jang-mi, the veteran nurse who rounds out that core trio, a role that belonged to Ha Young in Season 1.
The series follows Baek as he joins a struggling trauma team at a hospital and fights to bring it back to life, a premise pulled from the webtoon Trauma Center: Golden Hour.
Also confirmed to return:
- Ju Ji-hoon as surgeon Baek Kang-hyuk
- Choo Young-woo as Yang Jae-won
- Yoon Kyung-ho and Jung Jae-kwang
Director Lee Do-yoon will return to helm the series and will write Season 2. He will also direct Season 3, cowriting that script with emerging screenwriter Tomasi. Episode counts and a release format have not been announced.
Who Is Jung Ye-in, the New Cheon Jang-mi?
Cheon Jang-mi is not a background part. She shares the show’s center with Baek Kang-hyuk and Yang Jae-won, so Jung is stepping into one of the most visible roles in a Netflix franchise that found viewers far beyond Korea.
Her route there runs through K-pop. Jung debuted with Lovelyz in 2014 and gained popularity through group hits including Ah-Choo, Destiny and Hi~. She started acting in 2017, playing the younger version of Moon Chae-won’s character in the tvN drama Criminal Minds, and later appeared in the Tving and Watcha series Inssa ga Doego Sipeun Nara and the Dramabox series Susukkki Chaebol Ttal.
That makes the casting a 12-year path from group debut to a central role in a major Netflix title. It also was not automatic: Jung auditioned multiple times before landing the part, according to reporting on the process. For fans who followed Lovelyz during their active years, this is a bigger stage than any variety appearance or supporting credit she has taken on since.
Why the Nurse Role Changed Hands
Ha Young played Cheon Jang-mi in Season 1 and won fans with the performance. She had been set to continue in the role across Seasons 2 and 3.
Backlash erupted in August 2026 over her remarks about her great-grandfather’s activities during Japan’s colonial rule of Korea. She apologized, explaining that her understanding of his past had been shaped largely by family accounts. The controversy cost her several advertising deals and public-facing projects.
Netflix confirmed her departure in September, saying it would “respect the actor’s position.” Jung’s casting was confirmed on Sept. 29. Because the series follows its webtoon source material, the change swaps the on-screen face of the trauma team without altering the story underneath it.
The Numbers Behind the Two-Season Order
The Trauma Code: Heroes on Call released in 2025 and turned into a global hit for Netflix, blending high-stakes medical cases with action and humor. During its peak tracking week, from Jan. 27 to Feb. 2, 2025, it collected 82.7 million viewing hours and 11.9 million views.
Those figures put it at No. 1 on Netflix’s global Top 10 for non-English TV shows and No. 3 across all TV titles that week. Netflix has pointed to Season 1 reaching the Top 10 in 63 countries and No. 1 in 18 markets, numbers that explain why the platform skipped the usual single-season renewal and committed to two at once.
Shooting both seasons back to back keeps the ensemble locked in and can compress the gap between releases, which matters for a title whose first season rode a fast global chart run.
The Trauma Code Season 2 Release Date: What Comes Next
No premiere dates have been announced for either season. As of late September reporting, filming on Seasons 2 and 3 was set to begin the following month, though Netflix has not publicly confirmed a production start.
What is confirmed points to continuity: the same director, the same leads, the same source material, and only one seat in the central trio filled by a new actor.
Worth watching next: the first table read, official stills, a teaser, and any word on whether the two seasons arrive close together or as separate Netflix releases. Until the streamer posts a date, any release window circulating online stays unconfirmed, and how the new nurse is written into the story remains an open question.