After the puzzle challenge ends before anyone manages to complete it, Mutta confronts Naoto about what he saw, but he only tasks him with finding out the reason why he broke the clock. Meanwhile, Team B continues to be plagued by the mysterious alarm, which is secretly being controlled by one of the participants, and soon find their clock has been tampered with as well. Meanwhile, as Serika grows concerned that she's used too much food for cooking, with not much left for the remaining four days, Team A is soon given their own alarm problem.