Characters played by Han Suk-kyu
Dr. Boo Yong Joo
Teacher Kim
Characters played by Woo-min Byeon
Anesthesiologist Nam Do Il
Characters played by Jin Kyung
Head Nurse Oh Myung Shim
Characters played by Min-Jae Kim
Nurse Park Eun Tak
Characters played by Na-Moo Yoon
Dr. Jeong In Soo
Characters played by Im Won-hee
Manager Jang Gi Tae
Characters played by Choi Jin-ho
Director Do Yoon Wan
Characters played by Kim Hong-pa
Director Yoo Woon Yeong
Characters played by Jang Hyuk-jin
Dr. Song Hyeon Cheol
Characters played by Hyeon-jin Seo
Dr. Yoon Seo Jeong
Characters played by Yoo Yeon-Seok
Dr. Kang Dong Joo
Characters played by Lee Song-Kyoung
Dr. Cha Eun Jae
Characters played by Ahn Hyo-Seop
Dr. Seo Woo Jin
Characters played by Kim Joo-Heon
Dr. Park Min Gook
Characters played by Sin Dong-Wook
Dr. Bae Moon Jeong
Characters played by Joo-yeon So
Dr. Yoon Ah Reum
Characters played by Yang Se-Jong
Dr. Do In Bum
Characters played by Eun-Su Seo
Woo Yeon Hwa
Characters played by Bo-ra Yoon
Joo Hyung Mi
Characters played by Hyo-ju Park
Anesthesiologist Shim Hye Jin
Characters played by Chan-Young Yoon
Kang Dong Joo [Young]
Characters played by Ko Sang-ho
Dr. Yang Ho Joon
Characters played by In-ho Tae
Dr. Moon Tae Hwa
Characters played by Lee Ho-jung
trainee nurse Lee Ji-Eun
Characters played by Hyeok-soo Kwon
Minister Ryu
Characters played by Ji Hye-Won
Seo Se Young (Trainee Nurse)
Characters played by Kim No-Jin
Jung Ka-Young
Characters played by Kim Hye-su
Dr. Lee Young Jo
Characters played by Soo-jin Kim
Patient's Wife
Characters played by Im Chul-soo
Loan shark
Characters played by Lee Ho-Cheol
Loan shark
Characters played by Lee Ji-Hyun
Soon Young's mother
Characters played by Sin Dong-ryeok
Geodae Hospital doctor
Characters played by Sung-Il Park
police officer in ER