2x4 - The Numbers

Jyugo is saved by Tsukumo from an out-of-control Rock. Meanwhile, Hajime deals with Yamato, who's in the same state as Rock. After finding a talisman on the two of them, Hajime and the others recognize the talismans belonging to Building 5. Hajime decides to go investigate the matter, and with much convincing on Uno's part, takes Cell 13 (except Rock) with him. He leaves Building 13 surveillance to Mitsuru Hitokoe. Mitsuru tells Hajime that they contacted Building 5, but nobody has been responding.