Season 1

• 

  7.5/103,568 votes

  Episode 1

  Season 1 Episode 1 - Aired 1/28/2022

  Inside Lee Byeong-chan's science lab, a student incurs a seemingly harmless bite. Shortly after, a fast-spreading outbreak soaks the school in blood.

  Director: JQ Lee, Kim Nam-su

  Writer: Chun Sung-il

• 

  7.8/102,650 votes

  Episode 2

  Season 1 Episode 2 - Aired 1/28/2022

  The infected multiply in droves. Scrambling for their lives, Nam On-jo and Lee Cheong-san find safety with others inside a classroom — but not for long.

  Director: JQ Lee, Kim Nam-su

  Writer: Chun Sung-il

• 

  7.9/102,460 votes

  Episode 3

  Season 1 Episode 3 - Aired 1/28/2022

  When one of the group is scratched while fighting a zombie, Lee Na-yeon demands they kick him out. Outside, the virus swallows up the city.

  Director: JQ Lee, Kim Nam-su

  Writer: Chun Sung-il

• 

  7.7/102,168 votes

  Episode 4

  Season 1 Episode 4 - Aired 1/28/2022

  In need of a cellphone, two students take a risky journey to the teachers' office. Byeong-chan passes on critical information to Detective Song Jae-ik.

  Director: JQ Lee, Kim Nam-su

  Writer: Chun Sung-il

• 

  7.9/102,134 votes

  Episode 5

  Season 1 Episode 5 - Aired 1/28/2022

  Martial law is imposed on the city. When Cheong-san is separated from the rest of the group, On-jo leads a mission to use a drone to locate him.

  Director: JQ Lee, Kim Nam-su

  Writer: Chun Sung-il

• 

  7.4/102,076 votes

  Episode 6

  Season 1 Episode 6 - Aired 1/28/2022

  The group clears a path to Cheong-san using sound to draw away zombies, but a new type of threat surfaces. Nam So-ju breaks out of the quarantine camp.

  Director: JQ Lee, Kim Nam-su

  Writer: Chun Sung-il

• 

  7.9/102,042 votes

  Episode 7

  Season 1 Episode 7 - Aired 1/28/2022

  To make it out of the music room and onto the roof, the students put into action their most perilous plan yet. Elsewhere, Jae-ik comes across a setback.

  Director: JQ Lee, Kim Nam-su

  Writer: Chun Sung-il

• 

  7.7/102,015 votes

  Episode 8

  Season 1 Episode 8 - Aired 1/28/2022

  Jae-ik and his crew run into a student from the school. Na-yeon works up the courage to face her peers. The group shares confessions around a fire.

  Director: JQ Lee, Kim Nam-su

  Writer: Chun Sung-il

• 

  7.8/101,956 votes

  Episode 9

  Season 1 Episode 9 - Aired 1/28/2022

  A disturbance at the camp shifts the military's understanding of the virus. A thunderstorm provides cover as the group agrees to keep on moving.

  Director: JQ Lee, Kim Nam-su

  Writer: Chun Sung-il

• 

  7.9/101,962 votes

  Episode 10

  Season 1 Episode 10 - Aired 1/28/2022

  The auditorium quickly becomes a trap for the two newly united teams of survivors. Byeong-chan's video logs reveal a drastic solution to the crisis.

  Director: JQ Lee, Kim Nam-su

  Writer: Chun Sung-il

• 

  8.1/102,238 votes

  Episode 11

  Season 1 Episode 11 - Aired 1/28/2022

  Though a surprise protector provides the group safe passage to their next stop, Yoon Gwi-nam is not far behind. The military makes a grave decision.

  Director: JQ Lee, Kim Nam-su

  Writer: Chun Sung-il

• 

  7.4/102,324 votes

  Episode 12

  Season 1 Episode 12 - Aired 1/28/2022

  The students make it to the quarantine camp, each of them weighed down by tragic loss. Months later, they hang on to hope for a survivor.

  Director: JQ Lee, Kim Nam-su

  Writer: Chun Sung-il