: Science teacher Lee Byeong-chan reveals the virus was a desperate attempt to help his son fight back against severe bullying, though it ultimately caused more violence.

Discuss the (half-human, half-zombie) characters introduced here.

: The students navigate practical survival hurdles, such as building a makeshift bathroom in the broadcasting room. Critical Reception :

This episode is noted as one of the series' longest, effectively shifting the tone from chaotic action to a more tense, atmospheric focus on survival and the "dark sides" of human nature. :

Let me know how you'd like to of the series! All of Us Are Dead – Season 1 Episode 4 Recap & Review

Fans on IMDb rated it highly (approximately 8.5/10), praising the commentary on bullying and the "promising" ending scene.