Contains spoilers for this episode and earlier episodes.
The bathroom fight leaves Thanos and several other players dead, giving those who want to stop a narrow advantage before the next vote. Gi-hun expects the other side to attack after lights out. He tells his companions to hide rather than protect everyone, planning to seize the guards' weapons when they intervene. Nam-gyu kills Se-mi during the ensuing assault, while Min-su watches from above and fails to save her.
Gi-hun's group ambushes the guards, takes their guns and begins fighting toward the control room. Hyun-ju's military experience helps the inexperienced rebels use their weapons, but their ammunition runs low. Dae-ho returns to the dormitory for spare magazines and becomes too frightened to bring them back. At sea, Captain Park sabotages the search team's drone and kills the man who discovers him, continuing to conceal his role from Jun-ho and Woo-seok.
Young-il takes two rebels on an apparent flanking maneuver, then shoots them and fakes his own death over the radio. He switches channels and orders the guards to end the uprising. Hyun-ju goes looking for Dae-ho and finds him unable to continue, but cannot return before the dormitory is secured. Gi-hun and Jung-bae surrender after running out of ammunition. In-ho returns in the Front Man's mask and shoots Jung-bae in front of Gi-hun, leaving him alive to witness the collapse of his plan without learning who betrayed him.