Netflix has confirmed production of both Season 2 and Season 3 of The Trauma Code: Heroes on Call. The October 19 announcement makes official a two-season follow-up that Korean outlets had reported since September 2025, while Netflix said only that a sequel was being discussed. It still attaches no release date or episode count to either season.
Ju Ji-hoon, Choo Young-woo, Yoon Kyung-ho and Jeong Jae-kwang return to the trauma team. Jeong Ye-in joins them as nurse Cheon Jang-mi, the role Ha Young played in Season 1; Netflix says Jeong won the part through a rigorous audition.
Four returning actors keep the trauma team intact
Ju returns as Baek Kang-hyuk, the war-zone surgeon who came home to build a working trauma center at Hankuk National University Hospital. Choo is back as Yang Jae-won, Baek's first protégé. Jeong Jae-kwang reprises anesthesiologist Park Gyeong-won.
Yoon's Han Yu-rim has the clearest change of position. Netflix's Season 1 guide lists him as the general surgery department chair; the new announcement describes him as the hospital's chief of planning and coordination, a former opponent who is now Baek's trusted partner. That puts an administrator on Baek's side going into the new seasons.
Ha Young's exit opened the Cheon Jang-mi role
The one cast change sits at the center of the team. Netflix's Season 1 guide credits Ha Young as trauma nurse Cheon Jang-mi; the October 19 announcement assigns the same character to Jeong Ye-in, who also appears in Netflix's Season 2 cast graphic. This is a recast of an existing character, not a new nurse.
Netflix announced Ha Young's departure on September 1. According to Yonhap, the company said she would not appear in the next season out of respect for the actor's position, after allegations about her great-grandfather's pro-Japanese activities during the colonial era and her subsequent apology. The October announcement does not revisit her exit.
Lee Do-yun now writes as well as directs
Lee Do-yun, who directed Season 1 from scripts by Choi Tae-gang, returns as director and takes over the writing; Netflix's title information credits him as Season 2's writer. SBS reports that Lee shares Season 3's scripts with a newcomer. Studio N and Mays Entertainment produce, and the series remains based on the WEBTOON Trauma Center: Golden Hour.
Netflix's synopsis promises greater crises and unexpected circumstances, with Baek trying to expand and stabilize an effective trauma system. That extends Season 1's central fight with a hospital director who, in Netflix's own summary, withheld funding from the trauma unit. Netflix also says Season 1 reached its Top 10 in 63 countries in 2025 and ranked No. 1 in 18. In NexusGG's reading, that performance explains why the company committed to two seasons at once rather than testing demand with one.
Netflix has not dated either season
The announcement does not say whether the seasons will be released close together or keep Season 1's eight-episode length, and it includes no trailer or launch window. SBS reports that filming begins soon; earlier Korean reports had pointed to an October start. Any 2027 or 2028 premiere prediction remains a guess until Netflix publishes a timetable.
