Katherine is suspicious of Kothari, and despite all the signs she has changed her allegiance, Katherine has been highly trained not to give away information concerning the resistance.
Heyem materialises along with the others on the other side of the wall.
The group prepare to cross over to Russia, into the forbidden zone, marked out by the Amanojuko. (Happy Birthday, Dad and Uncle Robin, wherever you are.)
Katherine, although getting very weak, has spent most of her remaining time in her laboratory, despite having to share it with the encroaching Dr Kothari.