Despite secured DNA, witnesses and other technical evidence the double homicide in Linköping is yet to be solved.

Professor Leif GW Persson theorizes on the shootings in Malmö. The dismemberment of Björn Habolin is focused upon. In the year of 2005, the remains of Björn Habolin were found in Stockholm. The offender has not yet been captured. Camilla Kvartoft visits SKL (Swedish Crime forensics Laboratory) and gets the ins and outs of fingerprints.

Leif GW Persson and Camilla Kvartoft investigates the circumstances regarding the double homicide in Brattås, 2005. An elderly couple was murdered at their farm and the offender is still at large. Camilla Kvartoft visits The National Board of Forensic Medicine in Solna. Peter Söderlund, appears as guest and talks about his past in the organized crime organization, X-Cons, and how he managed to leave that behind him.

Professor Leif GW Persson investigates the yet unsolved murder of Nils Bergman in Skärholmen, 2002. Camilla Kvartoft visits Swedish Forencics Laboratory (SKL) and gets the full story on analysis of fires and how to discover insurance fraud as well as arsonists. Topic for this episode's historical case are the Börstig arsons which occurred during the 1960's.

Professor Leif GW Persson investigates the unsolved homicide of Dennis D'Agostino in Nacka, 2000. Camilla Kvartoft visits Swedish Forencics Laboratory (SKL) in Linköping where she uses hand-guns and gets to know the basics of ballistics. A retrospective look at the terrorist attack against the West-German embassy in Stockholm, 1975, is also part of this episode.