Yein replaces Ha Young in season 2 of Trauma Code
Season 2 of Trauma Code: Heroes on Call kicks off in October 2026 with Yein taking the role of Cheon Jang Mi.
Production of the second season of Trauma Code: Heroes on Call begins in October 2026. The cast undergoes a major change: K-pop star Yein takes the role of Cheon Jang Mi, replacing Ha Young. The series, an adaptation of the webtoon Severe Trauma Center: Golden Hour by Lee Nak Jun, is directed by Lee Do Yoon and written by So Hyun Kyung and Choi Tae Kang. It is produced by Studio N.
In 2025, Trauma Code: Heroes on Call established itself among the most-watched K-dramas on Netflix, spending five weeks in the global top-10, including one week at the top spot. It accumulated 184.5 million viewing hours, 26.6 million complete views and 39.6 million full watches according to the 2025 engagement report. On June 22 2026, Netflix confirmed renewal for seasons two and three, outlining the production schedule and episode count.