Professor Leif GW Persson theorizes about the homicide of 16-year old Anders Gustafsson who was murdered in Hammarbyhamnen, Stockholm, New Year's Eve 1994. Camilla Kvartoft visits National Laboratory of Forensic Science (SKL) in Linköping where she is taught what is to be known about drug analysis. Follow-up on the progress of Niklas Augustsson who participated in an earllier episode of this season. At the time he was recently released from prison and had just gotten a new home outside prison-walls. Studio guest appearance by inspector Christoffer Bohman, expert on drugs and experienced in dealing with drugs at bars and similar entertainment facilities.