Episode 59: Pages 165-181 of volume 4 of the Kodansha publication. [source]
A lot of things all happening at once. Tetsuo visits Miyako for the first time seeking her power. Kei manages to bring Masaru safely to Miyako's temple, but Chiyoko is in a bind with the Great Tokyo Empire. Looks like the Colonel spotted them and now has a choice to either save her or doom her.