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.
To open the door, her right hand is required.
.فتح الباب يتطلب يدها اليمنى
Um sie zu öffnen,
braucht man ihre rechte Hand.
Aunque su mano derecha era 
necesaria para abrir la puerta,
Aunque su mano derecha era 
necesaria para abrir la puerta,
Pour l’ouvrir,
il faut donc avoir sa main droite.
Per aprirla è necessaria la sua mano destra,
Para abri-la, era necessário 
usar a mão direita da Doutora,