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Si Young can't reach Yo Han, and she is worried about him. However, Yo Han doesn't contact her for three years. After the three years, Yo Han finally comes back to the hospital and meets Si Young, but he doesn't explain what happened to him for the past three years.
Hwang Hee
Lee Yoo-jun
Moon Hak-jin
Kim Jung Ho [3rd-year Resident Ophthalmology]
Noreen Joyce Guerra
Flight attendant
Kim Mi-hye
Questioner
Park Jin-young
Nurse
Park Si-wan
Cha Yo Han (child)
Jung Ji-hoon
Min Sung [Yoo Ri Hye's son]
Lee Yo-seong
Cha Yo Han's father
고용화
Lee Ki Suk's mother
Lim Dong-jin
Shim Joon Chul
Jung Kyung-soon
Yoo Joon's mother
Uhm Hyo-seop
Kang Yi-Moon
Jeon No-min
Kang Yi-Soo
Shin Dong-mi
Chae Eun-Jung
Kim Hye-eun
Tae-Kyung
Lee Kyoo-hyung
Son Seok-Ki
Yoon Chan-young
Lee Ki Suk (A CIPA patient)
Lee Se-young
Kang Shi-Young
Ji Sung
Cha Yo-Han
Kim Seung-hyun
Inmate
Jeong In-gi
Jung-Nam
Oh Seung-hyun
Min Joo-Kyung
Oh Yoo-na
Yoo Ri Hye [former actress who suffers from neuroblastoma]
Jang Hee-soo
Professor of Anesthesiology and Pain Medicine
Yun Ju-Sang
Lee Won Gil [Former Minister of Health and Welfare]
Oh Hyun-Joong
Kim Won Hee
Jeong Jae-seong
Kwon Suk
Kim Yeong-hoon
Han Myung Oh
Lee You-mi
Na Kyung Ah
Son San
Hong Yun Jin
Kwon Hwa-woon
Heo Joon
Chun Young-min
Lee Da-hae
Jung Min-ah
Kang Mi-Rae