1x11 - Descendants of Darkness

The case takes on a new turn as Watari discovers that Dr Muraki has been regularly visiting his old mentor from Shion University, Dr Satomi. When Tsuzuki and the others pay the university doctor a visit he seems oddly curt with them, distracted to meet in person the mysterious immortal who Muraki showed him in a 72-year old photograph. Things go from bad to worse when two girls from the high school, Maki and Mariko, are attacked by Muraki leaving one of them dead.