People binge eat and suffer from extreme thirst, which leads them to go crazy for water. They cannot control themselves because they are brainwashed by a parasite.
| Actor | Role |
|---|---|
 Kim Myung-minJae-hyeok | Jae-hyeok |
 Moon Jeong-heeKyeong-soon | Kyeong-soon |
 Kim Dong-wanJae-pil | Jae-pil |
 Lee HaneeYeon-joo | Yeon-joo |
 Uhm Ji-sungJoon-woo | Joon-woo |
 Kang Shin-ilDr. Hwang | Dr. Hwang |
 Jo Deok-hyeonTae-won | Tae-won |
 Jeon Kuk-hwanPrime Minister | Prime Minister |
 Choi Jung-wooHealth Minister | Health Minister |
 Lee Hyeong-cheolJason Kim | Jason Kim |
 Jung In-giSales Office Manager | Sales Office Manager |
 Song Young-changChief Kim | Chief Kim |
 Choi Il-hwaPresident | President |
 Kim Sae-byukBaby's Mother | Baby's Mother |
 Cho Han-chulResearcher | Researcher |
| KKim Ran-heunPharmaceutical Company Employee | Pharmaceutical Company Employee |
 Lee Il-subInterior Minister | Interior Minister |
 Jang Tae-minPolice | Police |
 Kang Ji-wonBride | Bride |
 Park Pal-youngPolice chief | Police chief |
| PPark Jong-wonSweeper | Sweeper |
| CChoi Gwang-deokPolice Officer at the Gym | Police Officer at the Gym |