Episode 69: Pages 342-357 of volume 4 of the Kodansha publication.
Ah, so finally Kei convinces Miyako to move her ass to safety with Masaru. In the meantime, they manage to communicate with Kiyoko in the Colonel's military-pod, which puts the Colonel in a bad position. However, it looks like we'll finally get to see what the Colonel's laser gun can do.
The chapter ends with Tetsuo beating them to their own secret hideout. I had a feeling Masaru's esper power was likely going to tip off Tetsuo and send him flying after them. Tetsuo seems to be increasingly more sensitive to "the force" (lol).