Saikawa and Nishinosono return to the camp, putting off trying to find a solution to the case. But they can't stop thinking about it. They go back to the lab and investigate Dr. Shiki's rooms again, where they find a strange number that is a clue.
When did it get to be night?
متى حلّ الليل؟
Wann ist es eigentlich
Nacht geworden?
¿Cuándo se hizo de noche?
¿Cuándo se hizo de noche?
È diventata notte tutto a un tratto?
Quando foi que anoiteceu?