Kim Sang-kyung
— Jeong Tae-hoon
Lee Sun-bin
— Han Young-ju
Yoon Kyeong-ho
— Seo Woo-sik
서영희
— Han Gil-ju
Jang Hyuk-jin
— President Cho
김정태
— Han Hyun-jong
송영규
— Jeong Kyung-han
이지훈
— In-ho
성병숙
— Soon-im
김하언
— Jung Min-woo
Kim Kyung-sik
— Ministry of Health and Welfare
Kim Dong-hwan
— O2 Staff
Brad Curtin
오동민
— Reporter
임영주
— Reporter
고서정
— Audience
조유진
— Victim 4
조서후
— Eun-jeong