 | Gong Yoo als Seok-woo |
 | Kim Su-an als Soo-ahn |
 | Jung Yu-mi als Sung-gyeong |
 | Ma Dong-seok als Sang-hwa |
 | Choi Woo-shik als Yeong-gook |
 | An So-hee als Jin-hee |
 | Kim Eui-sung als Yong-suk |
 | Ye Su-jeong als In-gil |
 | Park Myung-shin als Jong-gil |
 | Choi Gwi-hwa als Homeless Man |
 | Jeong Seok-yong als Captain of KTX |
 | Kim Chang-hwan als Kim Jin-mo |
 | Jang Hyuk-jin als Ki-chul |
 | Shim Eun-kyung als Stowaway |
 | Lee Joo-sil als Seok-woo's Mother |
 | Kim Jae-rok als Mr. Kim |
 | Baek Seung-hwan als Survivor (uncredited) |
 | Yeon Sang-ho als Control Room (uncredited) |
 | Choi Woo-sung als Infected (uncredited) |
 | Cha Chung-hwa als Mountaineering Woman |
 | Kim Won-jin als Embarrassing Youth |
 | Han Ji-eun als Earphones Girl |
| Han Sung-soo als Train Attendant |
 | Lee Jung-ok als Suit |
 | Kim Joo-heon als Baseball Team Manager |
 | Kim Keum-soon als Survivor |
| Chyu Kwang-hyun als Infected |
 | Jung Young-ki als Captain Min (voice) |
 | Ok Joo-ri als Survivor |
 | Kim Woon als Infected (uncredited) |
 | Jeon Ye-eun als Infected (uncredited) |
| Do-im Woo als Cabin Attendant Min-ji |
 | Song Ji-hyuk als Baseball Team |
| Yeon Sang-ho | Director |
| Lee Hyung-deok | Director of Photography |
| Yang Jin-mo | Editor |
| Kwak Tae-yong | Special Effects Makeup Artist |
| Kevin Kang | Colorist |
| Chansoo Kim | CG Supervisor |
| Choi Tae-young | Sound Mixer |
| Jung Hwang-soo | Visual Effects Supervisor |
| Marie Marolle | Stunts |
| Rim Seung-hee | Costume Design |
| Kim Ka-ryoon | Special Effects Makeup Artist |
| Hwang Hyo-kyun | Special Effects Makeup Artist |
| Jihyun Kim | Concept Artist |
| Kim Woo-taek | Executive Producer |
| Lee Mok-won | Production Design |
| Kim Yeon-ho | Producer |
| Gang Hye-yeong | Sound Designer |
| Lee Eun-ju | Makeup & Hair |
| Lee Dong-ha | Executive Producer |
| Jang Young-gyu | Original Music Composer |
| Kwon Yoo-jin | Costume Design |
| Lee Ji-hoon | Camera Operator |
| Park Kyoung-soo | Special Effects Supervisor |
| Park Joo-suk | Writer |
| Jin Hye-jung | Art Direction |
| Kim Byung-in | ADR Recordist |
| Park Cheong-woo | Lighting Director |
| Min Hong-nam | Assistant Director |
| Oh Jin-seok | Props |
| Heo Myeong-haeng | Fight Choreographer |
| Huh Soo Young | Co-Executive Producer |
| Lee Hye-ran | Costume Design |
| Kim Seon-wung | Stunts |
| Yoo Mi-jin | Stunts |
| Kang Bong-sung | Production Sound Mixer |
| Jung Do-ahn | Special Effects Supervisor |
| Lee Hee-eun | Special Effects Makeup Artist |
| Jeong Jin-geun | Martial Arts Choreographer |
| Jang Hee-sun | Art Direction |
| Song Min-seok | Stunts |
| Son Seung-hyeon | VFX Supervisor |
| Yeon Sang-ho | Adaptation |
| Ryu Yeon | Digital Intermediate Producer |
| Jung Hoon | Grip |
| Song Gyeong-seop | Still Photographer |
| Yun Min-gyu | Stunts |
| Lee Byeong-ju | VFX Artist |
| Kim Ho-sik | Special Effects Makeup Artist |
