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.
The elevator is displaying "B2."
"B2" يُظهر المصعد
Der Fahrstuhl zeigt B-2.
El ascensor dice B2.
El ascensor dice B2.
Sul display dell'ascensore c'è scritto "B2"!
A tela do elevador 
está mostrando "B2".