Gong Yoo character Seok Woo
Ma Dong-seok character Sang Hwa
Jung Yu-mi character Sung Gyeong
Choi Woo-shik character Yeong Gook
Ahn So-hee character Jin Hee
Kim Soo-an character Soo Ahn
Kim Eui-sung character Yong Suk
Choi Gwi-hwa character Homeless man (uncredited)
Jeong Seok-yong character Captain of KTX (uncredited)
Kim Chang-hwan character Kim Jin-mo (uncredited)
Jang Hyuk-jin character Ki-Chul (uncredited)
Shim Eun-kyung character Stowaway (uncredited)
Park Myung-shin character Jong-Gil (uncredited)
Ye Soo-jung character In-gil (uncredited)
Terri Doty character Seong-kyeong (voice) (uncredited)
Choi Woo-sung character Infected Person (uncredited)
Baek Seung-hwan character (uncredited)
Yeon Sang-ho character Control Room (voice) (uncredited)
Lee Joo-sil character Seok-woo's Mother (uncredited)
Kim Jae-rok character Mr. Kim (uncredited)
Cha Chung-hwa character Mountain clothing woman (uncredited)
