As alliances form among the players, no one is safe in the dorm after lights-out. The third game challenges Gi-hun’s team to think strategically.

Gi-hun and his team take turns keeping guard through the night. The masked men encounter trouble with their co-conspirators.

Players pair off for the fourth game. Gi-hun grapples with a moral dilemma, Sang-woo chooses self-preservation and Sae-byeok shares her untold story.

Baek Hye-min introduces herself to Eun-young as a new transfer student and presents a solution to a mite infestation that’s hard to stomach.