Rondo of Retrospection (E03)

Sakurai requests the group to investigate a Jewish Russian violinist named Sergei Krainev, whom the Kwantung Army suspects is a foreign spy who's been leaking classified military information. The members of the Sakurai organization will need to use all of their skills to crack this case.n again. Could these disappearances be linked to a film that is being shot on board? (Crunchyroll)