The Trauma Code: Heroes on Call

Main

• Ju Ji-hoon as Baek Kang-hyuk^[2]

A genius trauma surgeon and ex-mercenary combat medic who becomes the director of the Trauma Unit that became a Trauma Center at Hankuk National University Hospital.

• Choo Young-woo as Yang Jae-won^[2]

A fellow who becomes Kang-hyuk's first disciple. He is smart and pacifist who cannot lie. He is also a top scholar student for whole semester in medical school and the only son of a third-generation doctor family.

• Ha Young as Cheon Jang-mi^[2]

A nurse with five years of experience in the Trauma Unit at Hankuk National University Hospital.

• Yoon Kyung-ho as Han Yu-rim^[2]

A proctologist and the head of general surgery and colorectal surgery who watches Kang-hyuk closely after losing his protégé, Jae-won.

• Jung Jae-kwang as Park Gyeong-won^[2]

A resident who takes on difficult surgeries in the anesthesiology department right before his specialist exam.

Supporting

• Kim Eui-sung as Choi Jo-eun^[3]

Director of Hankuk National University Hospital.

• Kim Won-hae as Hong Jae-hun^[4]

Director of Planning and Coordination of Hankuk National University Hospital.

• Kim Sun-young as Kang Myeong-hui^[4]

Minister of Ministry of Health and Welfare.

• Park Ye-ni [ko] as Agnes Song^[1]
• Hong Woo-jin [ko] as An Jung-heon^[1]

Team leader of 119 Air Rescue Unit.

• Min Young [ko] as Ma Tae-rim^[1]
• Jang Sung-yoon [ko] as Nurse Kim^[5]
• Park Jung-yoon as Han Ji-young^[6]

Han Yu-rim's daughter.

• Kim Youn-jeong as Nurse Hong^[1]
• Kim Chung-gil [ko] as Hwang Seon-u^[1]

An anesthesiologist.

• Lee Jung-in as Joo Hyung-wook^[7]

A fellow at Hepatobiliary and Pancreatic Department who has been with Jae-won since their resident years.

• Jo Jae-young as an emergency medical resident^[1]
• Oh Jung-woo as an emergency medical intern^[1]
• Bang You-in as Nurse Bang^[1]
• Park Gwan-woo as an emergency room nurse 1^[1]
• Jang Yoo-jung as an emergency room nurse 2^[1]
• Kwon Hye-min as an emergency room nurse 3^[1]
• Jo Hoon as a helicopter crew^[1]
• Lee Geun-hoo [ko] as a helicopter pilot^[1]
• Kim Seo-joon as a helicopter co-pilot^[1]

Special appearance

• Kim Jae-won as Seo Dong-ju^[1]

A military doctor.

Development

In 2022, Lee Nak-jun, also known by his pen name Hansanleega, an otolaryngologist, YouTuber and web novel writer, appeared as a guest on the February 7 episode of KBS Cool FM's Park Myung-soo's Radio Show. He stated that they already signed a contract for the drama rights of his web novel Trauma Center: Golden Hour and thought of Gong Yoo and Kim Nam-gil to star in the series.^[8] In September 2024, the web novel has recently been decided to be made into a drama and was developed under the working title Severe Trauma Center: Golden Hour (Korean: 중증외상센터: 골든 아워).^[9] The series is written by Choi Tae-kang, directed by Lee Do-yoon, and produced by Studio N and Mays Entertainment.^[10]

In September 2025, it was reported that the second and third season of the series would have a simultaneous production but Netflix refuted it and stated that nothing has been confirmed.^[11][12]

Casting

In September 2022, Ju Ji-hoon was considered to be the lead actor of the series.^[9] In January 2023, Ju's agency Blitzway Studios confirmed that they received the offer and are reviewing it.^[13] In April 2023, Choo Young-woo has been cast^[14] and his agency, J,Wide-Company stated that he considered to appear.^[15] The cast lineup namely Ju, Choo, Yoon Kyung-ho, Ha Young, and Jung Jae-kwang were revealed in June 2023.^[16]

Critical response

Pierce Conran of South China Morning Post rated the series four out of five and praised Ju Ji-hoon's acting, "central to the show's success is Ju, who has seldom been better as the picture-perfect Baek Kang-hyuk, an enormously attractive role that complements his strong points." He added that "The Trauma Code: Heroes on Call is a show that takes the medical action drama formula honed by shows like Dr. Romantic and both pares it down and amps it up. The characters are simpler, as is the drama, with the focus squarely on scratching viewers' itch for heroic highs."^[20]

Viewership

The word-of-mouth success of The Trauma Code: Heroes on Call is reflected in its numbers. From January 27 to February 2, the show recorded 11.9 million views (calculated by dividing total watch hours by the runtime), reaching the first place of Netflix's global non-English TV rankings just 10 days after its release. The series topped the charts in 17 countries, including Korea, Thailand, Taiwan, Malaysia, Chile and Peru, and entered the Top 10 in 63 countries, including New Zealand, France, Italy, Mexico, Brazil, India, Japan and Egypt. According to Good Data Corporation, a Korean content analytics firm, the show's buzz surged by 140 percent compared to the previous week, making it 2.5 times more talked about than Squid Game season 2.^[21]

Accolades