The theme of the episode will in fact revolve around a simple question: is it possible to use the scientific police techniques that we read in the newspapers or that we see in successful crime series such as C.S.I. to investigate past crimes, with laboratory analyzes on skeletons found in archaeological sites? Like true detectives, we will try to shed light on some enigmas that occurred many centuries ago, showing how the profession of the investigator and that of the archaeologist are not as different as one might think. The brutal murder of a Roman nobleman and the ensuing trial will be told, in an investigation conducted by the greatest lawyer of antiquity: Cicero, who left the detailed account of this dramatic case which took place in Rome in 81 BC. Alberto Angela will also investigate the exceptional discovery of 54 decapitated skeletons and, nearby, 51 skulls dating back to the era of Viking raids in Great Britain. Who were they?