The lab maintenance is finished and the system comes back online. The police come to the island, but the investigation has made no progress. At last, however, Saikawa solves the mystery of the locked room and prepares to confront the culprit.
Were those Sohei-kun's students?
هل كانوا تلاميذ سوهي-كن؟
Waren das vielleicht
Soheis Studenten?
¿Eran los alumnos de Souhei-kun?
¿Eran los alumnos de Souhei-kun?
Des étudiants de Sôhei,
il me semble.
Non erano gli studenti di Sohei, quelli?
Se não me engano, eles eram alunos
 do laboratório do Souhei-kun.