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.

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.

As a state of emergency is declared, the residents tie up Pyeon Sang-wook for being bitten. Hyun-su is unable to ignore a family in distress.

An unexpected savior protects the children from harm as Hyun-su, together with Yoon Ji-su and Jung Jae-heon, tries to bring them to safety.

Hyun-su saves the others from a deadly attack. Running out of necessities, Eun-hyeok announces a plan to venture outside for resources.