- ?? - Lee Yoo-jun
- Jung Min-ah - Kang Mi-Rae
- Chun Young-min - Lee Da-hae
- ??? - Heo Joon
- Son San - Hong Yun Jin
- Lee You-mi - Na Kyung Ah
- Kim Yeong-hoon - Han Myung Oh
- ??? - Kwon Suk
- Oh Hyun-Joong - Kim Won Hee
- Jung Kyung-soon - Yoo Joon's mother
- Park Jin-young - Nurse
- Kim Mi-hye - Questioner
- Noreen Joyce Guerra - Flight attendant
- Yoon Joo-sang - Lee Won Gil
- Yoon Joo-sang - Lee Won Gil [Former Minister of Health and Welfare]
- Moon Hak-Jin - Kim Jung Ho [3rd-year Resident Ophthalmology]
- Jang Hee-soo - Professor of Anesthesiology and Pain Medicine
- Yoon Chan-young - Lee Ki Suk (A CIPA patient)
- Oh Yoo-na - Yoo Ri Hye [former actress who suffers from neuroblastoma]
- Lim Dong-jin - Shim Joon Chul
- Lee Yo-seong - Cha Yo Han's father
- Park Si-wan - Cha Yo Han (child)
- Son Hee-soon - Woman at the intensive care unit
- Choi Yoon Joon - [Patient looking only for Cha Yo Han]
- So Hee-jung - Yoo Ri Hye's sister
- Park Jung-eon - Chae Eun Jung's older sister
- Im Byeong-gi - ‘Death talk’ discussion leader
- Jo Soo-won
- Kim Ji-woon
Ji Sung hace el papel de Cha Yo-Han.
??? hace el papel de Kang Shi-Young.
Lee Kyoo-hyung interpreta a Son Seok-Ki en la serie.
??? interpreta a Tae-Kyung en la serie.
??? hace el papel de Chae Eun-Jung.
Jeon No-min hace el papel de Kang Yi-Soo.
Uhm Hyo-seop hace el papel de Kang Yi-Moon.
??? interpreta a Min Joo-Kyung en la serie.
??? interpreta a Jung-Nam en la serie.
?? interpreta a Lee Yoo-jun en la serie.
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