21g, the Weight of a Soul (1)

Ji Seong

Cha Yo-Han

Lee Se-young

Kang Shi-Young

Lee Kyu-hyung

Son Seok-Ki

Kim Hye-eun

Tae-Kyung

Shin Dong-mi

Chae Eun-Jung

전노민

Kang Yi-Soo

Eom Hyo-seob

Kang Yi-Moon

오승현

Min Joo-Kyung

정인기

Jung-Nam

Hwang Hee

Lee Yoo-jun

Jung Min-ah

Kang Mi-Rae

Chun Young-min

Lee Da-hae

권화운

Heo Joon

Son San

Hong Yun Jin

Yoomee Lee

Na Kyung Ah

김영훈

Han Myung Oh

정재성

Kwon Suk

오현중

Kim Won Hee

Jung Kyung-soon

Yoo Joon's mother

박진영

Nurse

Kim Mi-hye

Questioner

Noreen Joyce Guerra

Flight attendant

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)

오유나

Yoo Ri Hye [former actress who suffers from neuroblastoma]

윤주상

Lee Won Gil [Former Minister of Health and Welfare]

Lim Dong-jin

Shim Joon Chul

고용화

Lee Ki Suk's mother

Lee Yo-seong

Cha Yo Han's father

Jung Ji-hoon

Min Sung [Yoo Ri Hye's son]

박시완

Cha Yo Han (child)

Kim Seung-hyun

Inmate

Son Hee-soon

Woman at the intensive care unit